Not at all. This is just about defaults. People can still choose arbitrary branch names. People can still set the default branch name, as I have:
[init]
defaultBranch = master
I just think "master" is an awesome word. Master record. Mastering. It just sounds cool to me and I'm gonna keep using it.I also think "main" is a stupid word that doesn't say much about anything. I even hate "main" functions.