There are loads of BSD and MIT variants. But if this is a real objection why not...

numpad0 · on Sept 25, 2021

Can you mix "v3 or later" code with v2 code? I think that's violation of copyright.

rwmj · on Sept 25, 2021

Does the toybox project mix their code with GPLv3+ code?

The weird argument above was that there are apparently too many variations of the GPL (even though there are many, many more BSD and MIT variants). So I said, stick to a single GPL variant. And then you ask if you can mix GPL versions together.

afiori · on Sept 25, 2021

the argument was that there are incompatible variations of the gpl, in most cases those variations of MIT licenses can be mixed in any way