i think it would be a good idea to bounce a track or a group of tracks to disk in mp3 or ogg as a ‘temporarily rendered’ track. then that group of tracks become ‘read-only’, as the partially rendered stream will take over while you continue to make music. so any vsts used in those tracks doesn’t take any cpu time anymore - good cpu saver you still can visualise them in the oscilloscopes… maybe in different colour.
of course, if you change or modify the contents of the tracks, you can hit a button to bounce again, etc. the bounced track must be beatsync-ed, then.
is this a new idea, i wonder?