Ditto.
As I'm sure you know, the Quadra was produced during the dying days of ARP Instruments, and it's regarded as a lunge that failed. It remained for the Avatar to deliver the final blow. I do wonder if a Quadra re-issue could do any better today. It's four mediocre synthesizers in one, with a nice stereo phaser added. But if you like the ARP sound, then this is the one for you. If reasonably priced, it would probably have a cult following, but I imagine that following would be significantly smaller even than the Odyssey and 2600 base. I'd love to have one myself, but I'm not the typical synthesist. Nor would I buy one produced by his highness.
I'll be surprised if a new Quadra ever sees the light of day. Personally, I would much more prefer an ARP Axe, Solus, or Omni II re-issue - each full sized, of course.