Earlier quoted context omitted.
My opinion: `main` is better. It's shorter, it's more descriptive, and costs nothing to remove something someone might find offensive. It's pretty much an all around win.
Its worse because suddenly 20 years worth of tutorials are slightly 'wrong' and will confuse new users even more for no reason. "Why does my git say main and not master? Did I break it?" "Why cant I push to master like the 100x tutorials show? I get errors!"
Also if your tutorials are using a base repository to work from, then you can still have the branch "master" it's just not default. So your existing repos should still work. And if you changed your repo then you should be responsible for updating your documentation to reflect that. It's just good practice.