Nine domains, one machine

The temptation, reading the industrial economy right now, is to file each headline in its own drawer. Defence budgets rising in one. Data centres in another. Humanoid robots, machine tools, nuclear restarts, chip fabs, each with its own analysts and its own press. The filing is tidy and it hides the point. The nine drawers hold one machine, and the wiring between the parts is where the value moves.

ISI covers nine domains: aerospace defence and space; mobility; heavy machinery; robotics and embodied AI; advanced manufacturing and materials; industrial software and the agentic factory; semiconductors and compute; data centres and digital infrastructure; energy, nuclear and grid. Set out as a list, that reads like a beat too wide to hold. Set out as a system, it reads as a single argument with nine access points. What follows is the wiring, one linkage at a time.

Compute pulls power

Start with the loudest node. The AI build-out is usually told as a compute story, measured in chips and model sizes. Underneath it is an electricity story. The IEA puts global data centre electricity demand at around 415 terawatt-hours in 2024, rising to roughly 945 by 2030, with AI the primary driver and the United States absorbing close to half the growth (IEA). That is not a software line item. It is a load the size of a mid-tier national grid, arriving in under a decade.

So compute pulls power, and the pull is physical. A model runs on a data centre, a data centre runs on a substation, and the substation runs on generation that has to be built, permitted and connected. The bottleneck moved. For a while the scarce input was chips. Now, in a growing number of locations, it is the megawatt and the interconnection queue. The compute story became a power story the moment the load outgrew the local grid.

Power pulls grid and nuclear

Follow the load and it lands on the oldest, slowest domain in the set. The grid was built for demand that grew a percent or two a year. It is now being asked to absorb step changes tied to single sites. That pulls two things at once: new transmission and interconnection, which is grid; and firm, always-on generation that a hyperscaler can sign a twenty-year contract against, which is increasingly nuclear.

The nuclear pull is already visible in signed deals, not forecasts. Microsoft contracted the restart of Three Mile Island for 835 megawatts of always-on power (Data Center Dynamics). Amazon took a 1.92-gigawatt slice of the Susquehanna plant and put money into small modular reactors. Google signed for reactor capacity with Kairos. A domain most people had written off as a legacy asset became a hard constraint on the AI build-out. The AI build-out needs power that does not stop when the wind drops.

Autonomy pulls semiconductors and sensors

Now move off the screen and into the machine. The second wave of AI is embodied: robots, autonomous vehicles, software-defined equipment, systems that touch the physical world and act on it. Autonomy has its own supply chain, and it runs straight back into two domains.

It pulls semiconductors, because perception and control need compute at the edge, out on the machine as well as back in the data centre. It pulls sensors and power electronics, because a machine that moves has to see, decide and actuate under physics, in real time, on a battery. This is why the chip domain sits at the centre of the machine. The same silicon logic that trains a model in a data centre gets miniaturised, hardened and put on a mobile robot. Autonomy is a semiconductor demand curve wearing a chassis.

Reshoring pulls machinery, materials and labour

The fourth linkage is the one the policy money is aimed at. Building physically again is no longer a slogan. US manufacturing construction spending rose from about 75 billion dollars in 2021 to 236 billion at its 2024 peak, a tripling in three years, before cooling to a level still more than double the pre-boom base (Westside Construction Group). Semiconductor investment alone runs past 600 billion dollars committed across roughly 140 projects since 2020 (SIA, via Structural Resource Group).

A factory is not a building. It is a demand signal that fans out across the set. It pulls heavy machinery and the machine tools inside it. It pulls advanced materials and the process kit that turns them into product. And it pulls labour the reshored economy does not have, which is what routes reshoring straight into robotics. The factory that cannot be staffed is the factory that gets automated, and the automation is where the industrial software domain and the embodied-AI domain meet on the floor.

The floor is where the domains fuse

That fusion is the sixth node, and it closes the loop. Amazon crossed one million deployed robots in 2025 and runs a fleet coordinated by its own AI model (CNBC). Agility Robotics builds humanoids at a dedicated plant with a roadmap toward ten thousand units a year (FS Studio). The agentic factory is industrial software, robotics, semiconductors and advanced manufacturing arriving in the same room and behaving as one system.

And that system draws power, which routes back to the first linkage. The loop is real. More automation and more compute pull more electricity. That pulls more grid and more nuclear, which the reshored factory needs to run the robots the labour gap demanded. Nine domains, one machine.

The lens on top of the beat

Reading across the nine is the beat. It is what makes the coverage worth checking every week, because the story rarely stays inside one drawer. The defence budget is a machinery story. The data centre is a grid story. The robot is a semiconductor story. Whoever files them separately misses the linkage that is doing the work.

The lens on top of the beat has a name: frontier industrials. The bet is narrower than the coverage. AI is entering the physical economy, and the decade’s value migrates to where intelligence touches hardware, deployment and the industrial floor. That is the thesis the coverage serves, refreshed as the wave moves. The beat gives durability. The thesis gives the edge. The winners will mostly not be the companies with the loudest frontier logo. They will be the ones deploying the kit inside the domains most people find dull.

The nine domains are the parts. The connections are the read. If you want the connections traced week by week, across all nine and through the frontier lens, that is what ISI is for.

Read the beat. ISI publishes on Substack, across all nine domains and the frontier-industrials thesis that sits on top of them. Subscribe here.