Thanks for replying Jim and your input.
re stability; I find BIAB extremely stable (XP)latest build and if it crashes I can usually work out what I did wrong. But then I don't record audio or midi in the programme and have no personal interest in printing anything.
Last year I had 2 instances of BIAB open and I clicked regenerate on the one in focus and when that started so did the other one, but not in sync. Didn't happen again but I spent a bit of time seeing if I could sync the 2 together but failed.

2 instances however did run at the same time but what a mess frown Both BIABs were in DAW mode and visible equally on my 48" monitor, one, the 1st one to play, with an extra bar at the start to give me time to count and press play on the 2nd one at the start of bar2 of the 1st. SO that gave me the idea of 2 in sync. Both played with no problem but sounded like the 1st band I was in; ie everybody playing at different times grin

I qualify my next remark by saying I know nothing about programming but if BIAB had the ability to produce and read, say, MIDI clock, for example, this could be possible surely.

re the multiple drum tracks: It is pointless IMHO to have the ability to "Multi-track" if there is no ability to mix/remix the tracks after they leave BIAB.

RTs have the medley feature with the ability to change RT at certain points or have them all run together. But this time no little dB box to do a vague mix.

Also it is written that the theoretic limit of tracks in one instance of BIAB is 70; 10 on each track. So, again IMHO, 14 tracks,2 instances of BIAB in sync, could be achievable.
Or have a simple mixer "pop up" when adding more tracks to one instance and then ALL tracks able to be exported separately.

BUT all this aside BIAB is a totally unique programme and I could NOT live with out it.

thanks Jim for your honoured opinion cool

take care
Alyn