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
Who uses RARs who doesn't use 7z though?
I think using anything other than deflate zip for things like sending to teachers or whatever isn't very wise, and if you're not then you won't need to apologise anyway
Pirates. Almost always pirated software that comes in rars. Probably due to how it can be split up.