Linux magically solves this problem how? GPL isn't magic. It doesn't compel contributing upstream. And half of modern driver stacks live in userspace anyways.

There are also so many G.P.L. violations and nothing is done about it.

I think a big issue is also that it's hard to show actual damages with this kind of copyright violation. It's obviously copyright violation but what damages are there really? Also, there are so many dubious cases where it's not clear whether it is a violation or not.

Software Freedom Conservancy have been doing GPL compliance actions for a long time, especially if you consider their staff's previous lawsuit that resulted in OpenWRT existing. Also the more recent Vizio lawsuit is kinda interesting, it aims to enable any recipient of GPLed binaries to sue for GPL compliance.

https://sfconservancy.org/copyleft-compliance/ https://sfconservancy.org/copyleft-compliance/vizio.html

> And half of modern driver stacks live in userspace anyways ??? I haven't touched hardware whose driver lives in userspace since 2017 and it was a DMX512 controller of a shitty brand

They seem to be primarily targeting arm. A lot of drivers live in userspace for arm socs, especially on the higher end.