This is probably more common than you might think. I don't play games much, but I do need some software that only runs on Windows, and do this. One VM is Win7,

This is probably more common than you might think. I don't play games much, but I do need some software that only runs on Windows, and do this. One VM is Win7, the other is Win10. Neither get network access, so I don't worry about either surveillance or updates. I also have a VM that runs a really old version of Debian, because I have a couple UPSes that don't support modern ssh. I suspect we'll also see phone emulation for compatibility becoming more of a thing. Granted, the vast bulk of that software is garbage that nobody cares about, but there are things seeing increasing enterprise use. Someone will go out of business and orphan something people count on at some point.