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
In the last ten years, I haven’t ever sent a 7z to someone who ended up asking what the file was or how to open it. That was an issue back in 2005