There's something wrong with the migration of https://unix.stackexchange.com/questions/323524/seperating-glx-from-x11 to had 4 votes to migrate to Stack Overflow. It looks like the migration is in limbo: it's started (the question has been locked), but the question hasn't appeared on Stack Overflow (the asker has since then reposted it). It's been weeks, so this is not due to caching.