A particularly annoying side effect of this is that if you want to bring an existing repo into GitHub, the instructions now include `git branch -M main`, which

A particularly annoying side effect of this is that if you want to bring an existing repo into GitHub, the instructions now include `git branch -M main`, which will cause all sorts of problems if you have documentation, aliases and scripts which relate to a repo which exists in multiple places. I don't mind if GitHub wants to change their default, but don't assume that I want to change that for my own already-existing local repos.