It’d be a lot easier to argue that a railroad yard is a necessary part of a datacenter, and then eminent domain and pave it :)

But there’s some sensible planning in linking datacenters and railroads, honestly. Truck-shipping 44U fully-loaded cargo racks in standardized quarter-containers would a lot more sense in today’s AI-proliferation context. And I’d be up for seeing datacenters lose their natural lock-in resistance to customer migrations; “a competitor offered us a 5% discount plus freight refunds if we shift at least 5 cars of racks to them” is a lot easier when your datacenter has cargo crane capacity. There’s still a place for bespoke DCs but for the cog-in-the-cloud stuff that we have now, it’s not a bad idea!

(And, if you add a third rail for power-over-Ethernet, then you can start to have datacenter migrations that don’t cause an outage. Amtrak is already implementing the first stages of datacenter-grade connectivity for riders on their trains, though not amperes of the necessary degree yet.)