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
I refuse to send anything except .zip to basically anyone I know. Because if it was anything else they’d be confused. With the things I’m sending on a regular basis, small images and documents, the difference in performance between archive formats doesn’t really matter anyway.