JohnJohn. Really good idea to make a Simple VSTi version of Biab or RB.
But build it as a (64 Bit) PlugIn program for DAWs like Cubase, Cakewalk, and other major DAW's. I do have Cubase 8 pro, and their new well thought out Chord track/builder i use a lot. But Biab's high quality styles you don't realy get here.Not yet anyway( but I do think it is coming, sooner than you think)
If I could use BiaB's Rhytms/ styles (both MIDI and Real Tracks) and use the chords in cubase to trigger the heart of BiaB it would save my musicday- Now and a long long time. I can imagine that PGM would save a lot of time and effort to go this way. And They would sell a lot of this stuff I think.
Then they can continue their 32 bit route for their Main programs for people who still use their not (anymore) supported WindowsXP and 5-10 years old machines. - Then PGM have bought some time, to eventualy fade out their very old "W95" 'ish programs.