Never going to happen. Apple has been fighting any efforts that attempt to support building for iOS on non-Mac hardware.

I don't know why it matters so much, but it seems to matter to them. I doubt the little extra money they made back then from selling to developers would have mattered to them?

But like all tech giants, Apple is now refocusing on services rather than software and devices, so perhaps forcing all Apple developers into their build service is part of that effort.