Comment by Snetry

> I don't think that is correct. Do you have an example? Linus is adament that "[they] do not break userspace".

I think you interpreted Linus wrong. When he says "we do not break userspace" he is talking about the Kernel APIs that are exposed to the Userland.

Userland APIs would be stuff like glibc, which has a terrible track record in regards to API breakage.