/sci/ - Science & Math

>>16082335
They're entirely possible to build even at quite large sizes. The issue is economics. It's difficult to do that much of anything so far away when you can't get resources on site. In addition to that there's also the problem of lack of use case, thus leaving little justification for building one.
With increasing access to space enabling both the construction of ever larger objects in space and opening up the possibility for zero-g manufacturing and even potentially tourism I think it is likely we will see some sizeable artificial gravity habitats this century. Probably nothing on the scale of hundreds or even tens of square kilometers, but perhaps a few.