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’ve never come across a legitimate use of RAR, you are quite right about the link to warez/virus/trojans and other malware but it will never shake that association. As for Kaspersky, I trust that steaming pile of Russian spyware even less.
Indeed, I don’t trust those either. As for RAR being “bad”, no I don’t agree with that - but I’ve only ever seen it used in that context. If someone sent me one it would raise an eyebrow, much more so than if someone sent me a .7z file. Likewise if I used it professionally, it would arouse suspicions amongst my peers more than if I used 7zip.