I doubt licensing is a "detail" -- various comments say it matters a lot, e.g. https://stackoverflow.com/a/14488011/3831197

> The GPLv3 was the final straw that ended Apple's interest in contributing to GCC which is the reason Apple ended it at GCC 4.2.x.

I guess GPLv2 is still GPL, but here we end up talking about copyleft licenses (GPLv3) affecting business decisions anyway.