I take it you haven't tried a Prophet X or XL.
I have not, and I'm sure I would love it if I did (in my case physical space is the limiting factor).
When I say samples can't replace analog polys, I mean "cannot completely", in the analog purist sense, and for my own purposes .... Not in the sense that a sampled analog poly can't sound just as great in most mixes and specific cases -- it's just that a sample cannot be manipulated in exactly the same ways, with the same results as a true analog signal, in real time.
If a sampler (or even virtual analog for that matter) could truly replace analog, there would be no demand for analog. Vintage synths wouldn't be selling for crazy amounts. All of the timbres of the original synths would have already been captured, and their original parameters perfectly emulated. Yet the current state of technology is not even close to that, we still need real analog to sound analog, all these decades later (and I've been doing this since the mid 80s).
But yeah, I wouldn't mind having a Prophet X, if Dave released a desktop version with full knobbery at about a $2k price point I'm probably in.