The world is large. There is still infinite room left on earth closer than space.
The reason the DC want to be placed in proximity to people is to get access to the infrastructure, electricity grid and roads. I think the next natural step is to just put the DC further away from existing infrastructure and pay for the connect, not move to space.
The concern isn't at all about physical space, DCs are compact, it's about limitations of the infrastructure you're talking about. Turbines currently have a multi-year backlog. The interconnection queue for new generation is an even longer backlog in many grid regions. And there's a general populist backlash against them.
The reason the DC want to be placed in proximity to people is to get access to the infrastructure, electricity grid and roads. I think the next natural step is to just put the DC further away from existing infrastructure and pay for the connect, not move to space.