You can imagine someone mixing a record is not going to use the same gtr comp setting for every song and most studio comps have a few more controls than the average gtr pedal comp. So there's no one size fits all setting, maybe if you're only using it on slide [ or like readjusting it often to suit the song ] but just the difference in picking attack from funk to lead to light arpeggios. That makes multiple comps make more sense aside from the stacking. They can be useful but sometimes once you really hear it you can't un-hear it, not everyone's cup of tea for sure!