Glad they're eventually going to make it easy to rename in existing repositories; it would be annoying to do by hand, but also annoying to have different names in different repos.
I wonder if someone will make some git extension to make "master" an alias of "main".
Now that I think about it, I usually do "git init" and add a remote later. I guess this change only works if you clone the empty repo that Github creates. Is git itself going to change too?