To a degree, I agree with you. When I say the Prophet 12 is the new Andromeda, just as when I posed the original question, I'm speaking in general. Obviously, no instrument is going to exactly match the A6, just as no instrument is going to exactly match the P12. They are two distinct instruments from two distinct eras. But in general, for impressive polyphony and complexity, I think the two are in the same league. And best of all, the P12 is in production and being maintained, which is far more than could have been said for Alesis and the A6. That's the primary reason I never bought one.
So, for those of us who can't swing a bill bigger than $3,000, the P12 is a very impressive possibility, whereas, the large Modal Electronics instruments are out of the question, even though you might find their synthesizers to be better matches for the Andromeda.