> LLVM and clang specifically started eating its lunch

I don't know how you can eat GCC's lunch. I feel like in this analogy GCC eats from a communal trough and is very happy to share. A company that sells licenses can lose customers, the GNU project just wants the world to benefit. GCC is still ubiquitous and has plenty of developers and mindshare, what more could they want?

Most certainly not. The modularity was not great, but BIG chunks of code could be copied. I did that myself.