A PC should be at least as good as a Mac for producing BiaB backing tracks. FWIW BiaB for PC and BiaB for Mac are separate products, so you'd have to buy a 2nd version if you jumped to Mac from a PC as far as I know.

Ableton is a capable DAW. There are at least three versions though, and the lntro version will have some limits on things like # of tracks is 16 max. Nothing that will prevent you from producing backing tracks though. Lots of passion about DAW choice here. But there are folks using the most basic DAW and making the most amazing music. It's really more about you and how you USE the DAW than the DAW itself IMHO.

Am only vaguely familiar with very early Sade and songs like "Smooth Operator" and "Sweetest Taboo". I haven't explored this style of music in BiaB but I believe there are sufficient styles to build this style of backing track in BiaB.

Others will have different and perhaps better opinions.

Good luck!

DC Ron
BiaB Audiophile
Presonus Studio One
StudioCat DAW dual screen
Presonus Faderport 16
Too many guitars (is that a thing?)