<< Yes, the downside is that when you edit a track, it becomes an "artist track", i.e., a wav file taking up space on your hard disk. On the other hand, that feature offer a much finer control over your track than the feature you're requesting, since you can regenerate single notes, musical phrases or entire bars. >>

Artist Performance Tracks aren't really a 'downside' when all of the benefits it provides are considered including the same disk space that would be required to do the same function in a DAW. In fact, an Artist Performance Track can save disk space by avoiding the possible creation of multiple renders of a RealTrack to edit in a DAW.

Also, it doesn't have to be a Wav file, it can be saved as a m4a file. An Artist Performance Track is a completely unique track that's no longer the RealTrack audio, midi or SuperMidi data and in regard to RealTrack audio, whatever editing is done to the file, isn't contained in the RealTrack audio file that was recorded by a session player. Any edit makes the audio file new and unique and it has to exist somewhere.

Its existence is no different than had a user made a UserTrack or purchased additional RealTracks or converted a midi/SuperMidi track to audio.

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