I'd say that similarly to Common Law where rights always come paired with counterpart obligations; the "restrictions" added by GPL vs Apache come with counterpa

I'd say that similarly to Common Law where rights always come paired with counterpart obligations; the "restrictions" added by GPL vs Apache come with counterpart advantages: they keep forks open source (vs proprietary) and favor contributions feeding back to the OS Community. I believe we should consider them altogether: disadvantages and advantages. Both permissive and copyleft licenses play important roles in the Open Source ecosystem. Different story are proprietary licenses.