<< Charlie I appreciate your sharing of both your knowledge and your enthusiasm! As I said, I remain unconvinced that Medley tracks are as good as additional mixer tracks but I enjoyed both the conversation and expansion of my BIAB knowledge! So Thank You for that! >>
You're welcome. I'm sure there's also others that remain unconvinced but from this conversation they've learned there's now "access and use of" additional tracks they were previously unaware were there. Your thoughtful and provocative questions have probably prompted curiosity to how users can possibly adapt the RT Medley into their own workflow. Maybe they'll question are there other 'lost' gems like the RT Medley feature to learn about and explore. (There are!)

There are many variables to whether Medley Tracks are as good as having more BIAB Mixer Legacy Tracks and those variables value will be answered by how they fit into each users workflow.

To DAWser's like yourself, they may be of limited use because you already have a solid workflow you're comfortable with, get great results from, and have a stable knowledge base of the software's and techniques.

To Accompaniment users that program songs using only BIAB to create backing tracks, not progressing to finishing their projects in a DAW and don't plan to upgrade to version 2021, the RT Medley Tracks may influence and change their entire procedure to how they construct and arrange their song product providing them the ability to enormously enhance the complexity, fullness, dynamics, uniqueness, professionalism and quality of their backing tracks. There's plenty of "ah-ha" moments (or Ooh-Aah's as in your case) to be discovered...

Here's a 'not in the manual' real-life example I had where I quickly, easily and efficiently was able to increase the RealTrack audio file content available for a RealTrack Legacy Track instrument by converting that track into a RT Medley track and combined other BIAB features together. I had a guitar solo part that wasn't coming together like I wanted. The Soloist was Dwight Sills and I loved the sound, timbre and feel but the solo wasn't just right for me. The three obvious options are to keep regenerating the part over and over until I find something suitable or to use the multi riff feature to search it out or to generate multiple tracks and 'comp' a solo.
I did this fourth option.
. I opened the RT Medley window (BIAB Feature)
. I filtered my search for RT Artist - Dwight Sills (BIAB Feature)
. Search results were 5 Dwight Sills RealTracks. Swing parts, Solos, Rhythms and Even parts at varying BPM's. But on each of the RT's, Dwight played the same guitar and amp set up! It was obvious the same player using the same guitar and amp set up. Lot's of new audio to choose from.
. I created a Medley file solely within BIAB and without having to save and export any WAV files and the RT Medley feature composed a Medley Track from 4 of those RT audio files with seamless and smooth transitions between the instrument changes. Perfect Fades and even single bars where two instruments sounded out together as one instrument faded out as the next instrument was fading in. The BIAB algorithm did all of those functions automatically, commercial grade, radio ready professionally and with a quality equal to and indistinguishable from what would have to been done manually in every DAW on the market. It truly was as simple as opening the RT Medley Window, searching and selecting only 4 RealTracks and generating the track... (BIAB Feature)

<< .if I put 10 vocal RTs on a medley track does BIAB automatically manage these so that they all generate slightly different sounds at every bar? >>
Yes. The same as a BIAB Mixer Legacy Track, the RT Medley Tracks will each independently and separately generate slightly different renders of each whole track. Additionally, the RT Medley Window has a 'Duplicate' button to allow you to select from 2-10 entries of the same RT at the single click of a button.

However, the same as with a Legacy Track generation and because of there's a maximum limit of available audio from a single RealTrack audio file, the algorithm may still on occasion select the same audio clip for multiple tracks in the same measure. If I were doing this, I would mix up the RealTrack vocals between several different selections and if necessary, apply a mild application of a 'Chorus' DXi or VST plug in across the whole track.

BIAB 2025:RB 2025, Latest builds: Dell Optiplex 7040 Desktop; Windows-10-64 bit, Intel Core i7-6700 3.4GHz CPU and 16 GB Ram Memory.