The presence of bundled apps which I don't use realy bother me, and always have. On old versions of macOS, I wiped all of them out with a post-installation script. sudo -rm did the trick, and never broke anything else. (They sometimes came back after major updates, but I had a "post-upgrade" script for that.)

Big Sur makes this incredibly painful though, with its root filesystem stuff. Not sure what I'll do if I ever need to use that version. It may or may not be worth it to modify the snapshot...