Modern equipment is incredibly versatile. Sometimes a Swiss army knife unit can take the place of several other pieces of your gear arsenal. If you have something else that does the job just as well, why bother keeping both?
I tend to use a medium-to-fast release setting. I’ve heard a lot of famous mixers say they set the release with the tempo of the song. So they would watch the gain reduction needle and have it release on beat with the song. I try my best to use this method.