> An interesting side note to the debate emerged when Liang Wang posted about LLVM creator Chris Lattner's offer to try to get LLVM's copyright assigned to the FSF back in 2005. It was part of an effort (that seemingly went nowhere) to integrate LLVM and GCC. Stallman never heard about the message:

So basically, if Stallman hadn't have missed the message, there's a very real possibility that LLVM would have ended up licensed under GPLv2 & then re-licensed to GPLv3. The engineering world would probably look radically different if that had happened.