That's what I do. But there are many songs that I prefer the BiaB style bass to what I can coax out of a MIDI keyboard and Trillian, or one of my Kontakt/Gigastudio libs. If the instrument used in a particular (jazz or Latin, in my case, but all styles could benefit) were available in a relatively basic Kontakt or Sampletank library, we could mix the two approaches with relative ease, blend my bass lines with, for example, RT443: Bass, Acoustic, Jazz Sw 140 , Neil Swainson. If Neil also added a small Kontakt set (nothing fancy, just single notes at a couple velocities, tempos and lengths) it would help a lo, and not be difficult to implement. Wouldn't even have to change the current styles, and probably could use the same Kontakt set with more than one RealTrack.

The coolest version would be to make the library so it could be played directly from BiaB as a sub-track of the regular bass, add the option to select the recorded (RealNotes?) or the RealTrack; this would require coding, though, so is not as simple (and still needs the library, regardless of format.)

It's all about the music.
(I keep telling myself that...)
http://www.davidkempton.com