Actually quite a lot of things exploded. You just don't care about the people who had to pick up the pieces. Moreover, lots of git repos still use master so "new generations" will just have to do deal with pointless divergence and breakage for nothing. The change wasn't progress. It wasn't useful. It didn't stop anyone being offended. It was and still is pure make-work for absolutely no purpose beyond the demonstration of power over irrelevant things.