An example of how I myself actually made use of that:

The core statement in my first post applies to soloist Realtracks as well as comping ones, and I had set an RT soloist solo for a certain number of bars and it stopped midways into the last bar because that bar had a melody note ahead of the next bar. Now, I actually wanted that soloist to keep on and overlap my melody so what I did was change the midi melody (moved that note's start into the next bar) but kept my audio Performance unaltered, then redid the soloist - and it worked perfectly cool

Just because you can, doesn't mean you should!
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BBox 2022 Audiophile, Mac Pro Intel, OSX 10.6.8, 800x600 (TV VGA)