alt Hacker News> It's the exception which is why it's talked about the most.
It's definitely not the only exception. libgl is another obvious example since different GPUs need different userland code. I would be surprised if there there had never been compat regressions in those.
libgl can be dlopened, glibc can't be. That is the problem. If libgl has some incompatibility, I can try to work around that. If glibc has some incompatibility, my executable won't even launch.
I agree with this article completely.