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
If they choose to use some obscure Unix system as their daily driver then it’s on them. Unless they specifically request tar or some other format, go with the safest option, which is zip.