Its possible.
Everything I say is only my opinion.

I wasn't to bad at kicking that 500 around myself.
I had some pretty good tricks on it.
But I dont see how it can compare to a properly designed interface like the JJ in any way except accidentally being able to preview samples from the card with a loop playing.
Its true that you could do anything an MPC could do eventually on the 500, but it took forever.
The JJ instrument program and the global select functions makes reassigning all the sounds and setting across a template every time you want to use a keyboard bank so moot its not even a comparison IMO. That used to take me a week just to guestimate and test out 3 baseline sounds.
With JJ I can test them all in half an hour.
But the very worst part of the 500 IMO was that after a week of wrangling it and trying to keep any inspiration I had for the same beat a week ago alive, then it would get the note to pad assignments all goofed up.
Its possible that mine being an earlier one it may have been more futzy in that last regard, I never used every 500 made.
But the screen, the wonky wheel, the stiff pads...
I haven't tried them out yet but I'm thinking a full faced touch screen interface should be able to do that better.
And maybe even more importantly, quicker.
As a scratchpad.
I'd only use hardware for proper work.
Specifically JJ on a 1000 or 25.