Like when you send a .7z instead of a .zip or .rar to a friend or a teacher because that’s what your computer has installed and they’re like “Oh No, not one of those, now I have to install 7Zip” even though the same program that opens .rar also opens .7z I feel like people are way more annoyed when they receive a .7z
Nonsense. I do not use RAR anymore, but sure as hell there does not exist a production stable robust archival format as great as RAR. It has the most complete Unix/Windows precision timestamp support AND recovery record feature builtin. It also has features like locking archive.
ZIP is a close second, with 7Z following and the rest way behind.