I load multiple generations of a RT in my DAW and then cut and paste from them (comp) until I get the one track that I want for the song. I may have a fills/solo track that is comped from a dozen or more regens of the same RT and than includes comped bars (or less) in the solo. I do much less comping on rhythm tracks but will comp a bar here and there to make segues into/out of solos/vocals sound better.
The reason I comp to such an extent with solos is that I believe that I should "do no harm." Meaning that if the solo RT can be comped to hint at the melody then it should, at the least, not distract from it. Or something like that

Our productions often appear sparse in the number of tracks but there is a lot of work in comping those few tracks to what I hope works.
Bud