Ooh a question I can answer. I will make the answer as neutral as I can just explaining the differences of old Data Centers and new ones.

I worked in several data centers (DC). But all were air cooled. These AI DCs are also called Hyper scales. They need liquid due to the density of heat production. In addition some literally use jet engines to power them instead of grid power. Some new DCs use loopholes like adding wheels to their power production so that way they can skirt around laws saying it's only temporary power production.

In the past a rack (42u standard) would hold things like hard drives, tape libraries, network stuff, and servers. Now they cram in GPUs by the dozens, run them at max via liquid cooling. Traditional DC cooling used air cooled hot and cold isles, raised floors with air conditioning pump and large scale chiller units.

Hyper scales are whole different animals. They are ment for processing. Depending on their loop system they need water connected right to GPU/CPUs, heat distribution, fresh water. All relatively new due to water's thermal mass.

Traditional DCs were air cooled. For perspective a fortune 500's DC may have been 3k sq ft. A Colo (multiple companies sharing one building for infrastructure) may be 15000-50000sq ft. These new data centers are now campuses. Like they are 8 data center buildings on one site because it's more practical to drive at some point.

TL;DR a Data Center =/= hyperscale data center.

https://www.theguardian.com/technology/2026/jan/15/elon-musk-xai-datacenter-memphis