Hi Nigel,
Absolutely no problem!

BIAB have implemented a form of this multi-render within their new 2019 BIAB DAW app, but this only seems to work for 1 track. This would probably suffice for me because I only tend to generate multiple takes for the lead instrument track (so that I can stitch the best bits together into a single track within Cubase), but I can see how this could be useful to do with all tracks (e.g. so you can choose the best drum breaks on part changes).

Obviously being able to regenerate tracks more quickly (whether solving this with multi-threading or by some other means) would make the generation of multiple takes much more usable.

I also like Rustyspoon's suggestion of pre-loading all the audio for every variation of the currently selected Realtracks into RAM so that it can be accessed more quickly. I am not sure how much RAM this would require but I would be prepared to invest in a lot more RAM if this was feasible!

Regards, Aubrey

If I hadn't seen such riches I could live with being poor.