Hmm, I don’t think a OT mk3 or version 2 would be a huge seller personally - the die hard Elektronauts would love it, but outside of this sphere it seems that most people don’t want a super flexible performance sample mangler, they just want gigs of sounds and good pads, mostly.
There is a video made by a pretty talented and knowledgable youtuber, where he has used most of the current crop of sampling sequencers, no doubt he knows his stuff, and his videos are pretty good, but even he does not really “get” the Octatrack, because he believes that an MPC can mangle just as well - you could say well that is just personal preference, but if you consider mangling to be realtime manipulation of multiple samples then it is pretty clear that OT has MPC beat on that score.
The OT is fairly unique in its specific strengths, lots of other gear can do some of or even more than it can do, but none can do exactly what it can do, IMHO.
LONG LIVE THE OCTATRACK!