At the risk of getting flamed, I want to find out if anyone is using a
jointer for thickness planing

Disclaimer - yes I know the jointer vs. planer debate is hashed out
here weekly, and the correct answer is that you need both a jointer
and a planer, so no need to flame me with those answers.

So the process would be to first do the usual -- joint a face, joint
an edge, rip the opposite edge -- then where you would use a planer,
use the jointer instead on the last face to get the board to final
width. You risk getting the faces out of parallel of course (how
often would this happen?)

I know you can use the jointer to taper a board by starting or ending
a board short of one end. So if you're thicknessing with the jointer
and the 2 faces are getting out of parallel, can't you use the
tapering technique to reduce width on the wider side? It's a hack for
sure, but seems like it might suffice.

Thanks,
Michael