Orbit is a bad place for a datacenter. Your equipment will be hot and bombarded with radiation. You can't do any repairs. Even with reusable rockets you still have to pay for fuel to launch everything into orbit. You get a small benefit of more efficient power generation but it's not worth all the downsides.
If you want to have solar-powered AI datacenter that you can't service, you'd be way better off building the power generation in a coastal desert and building your datacenter underwater.
With the space data centers, it’s more, “Okay yeah so let’s say you do…why?”
It just seems like a really hard thing to do when the available options are, like, the Chinese building data centers on the Tibetan plateau where it is cold, ample renewable energy, tons of land, and, like, oxygen.