GPLs are a bit complicated for companies because (personal opinion alert) I THINK it is ok if you’re a company, member of a particular community, to be able to embed that on some product and not be mandated to open-source the whole thing.

IMHO not everything needs to be open-source, but in many case it just makes so much sense that is a dumb idea to reinvent the wheel.

Many projects are succesfull this way. One I can think of is LLVM.