There are multiple aliases. For instance, I use !yt for YouTube (just checked and !youtube also works), and !twitch for Twitch. I'll agree with the parent in that it's very rare that I'm unable to guess the bang that I want.
Yup, throwing my hat into this ring of agreement. I used to have tons of special search engines in Chrome to do this, often aliased as name or something, and I switched to DDG and started using their Bang's just to realize that most of my custom search engines were obsolete and like 2-3 needed to be retrained in my head.
