The things I’ve read (admittedly mostly from the OpenBSD camp) from BSD devs, they seem to not worry about corporations building from their source that much, instead they actively try to get rid of GPL code because it isn’t permissive enough for their standards.
Theo wrote "GPL fans said the great problem we would face is that companies would take our BSD code, modify it, and not give back. Nope—the great problem we face is that people would wrap the GPL around our code, and lock us out in the same way that these supposed companies would lock us out. Just like the Linux community, we have many companies giving us code back, all the time.
But once the code is GPL’d, we cannot get it back."
Plan 9. We can still have textual interfaces without emulating the ancient use of teletypewriters.