I'll copy and paste anything anybody will pay me to copy and paste.
Usually it's just bad snare hits once in a while, the project I'm on right now for the entire record only a single tom hit got replaced...which is the way I prefer to work.
Backup vocals can be an issue, when the bass player or drummer actually gets ONE take that works well enough and of course they cannot reproduce it again but everybody is too embarrassed for the guy to replace it...so later after hours...chop chop....
War