Reaper, Harrison Mixbus 32c , Melodyne 5 editor

You have the above, they are all modern and non destructive like everything else is these days including Audacity now.
You don't go to their forums and ask them to devolution them to the 90's.
I'm only trying to bring PG into the modern age, looking at every other audio application this is what they all aim for and are designed for and used how I describe, in studio use you need it to be quick, ease of use for creativity flow, they are not all designed for just the home hobbyist that you can be laxed and get away with half baked things.
I don't see this from a musician's viewpoint as the musicians are the ones in the RealTracks and those in the studio hire musicians, sure if everyone was a musician and wanted auto-accompaniment for practice or learning, Biab was originally designed for this and we would not need DAW features and improvements, that seems to be where it's going now. If you work only with wav files as you say then Biab has had a DROP render to WAV for ages.
Reaper with it's scripting has a massive following, one of the biggest forums on the net, using scripts is a normal everyday thing, everyone thinks I'm saying use Reaper instead of PG products, if that's the case why do I spend so much time here trying to make the PG products better by learning from Reaper. I want the same for Mac users, I don't ignore them and just concentrate on Windows only.
I don't give PG ideas that are impossible for them to do, they are just industry standard things that the apps you have listed above use, same with Win 10 has got to be better than WinXP. They don't have to be years n years behind all the time with everything, they can be up there with all others, it's not something that's impossible as I show these things over n over.