<< I think we are asking for an "option" in users preferences, as in user preferred method, not a hard coded forced one way or the other method. >>
Why would you opt to generate and not hear what you've created? See RS, Rob, and my question.

<< If it plays automatically how long do you have to let it play for ? >>
You don't have to let it play. Stop and nothing plays. But why? What's the benefit of not hearing what you've intentionally created?

<< do you sit back and wait until it's finished and plays all the way through ? is that what it wants you to do ? >>
Sure, it that's what you want. Suppose you've created a track that's everything you could wish for except for a single measure. At that point, regen what's necessary and then listen seems logical, right?

<< should the user be allowed to have control over it like you can now with Riff Edit ? >>
A user has complete control. Auto starts, user manually stops.

<< or is destructive audio editing and wav creating a better way ? >>
Creating WAVs is what BIAB does. Post editing, regenerations are just that, post generation tasks. Think of multi-riffs and partial regeneration and regeneration as overdubs or punch-ins over recorded audio in a DAW.

<< you now have an option to use Riff Edit or the old way to render to 32 bit wav files attached to the SGU. >>

There you go. You nailed it.

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.