I wonder if the Amiga was the "High Point" in the careers of most of them, or if most of them went on to bigger and better projects?
I would guess that the Amiga was a once in a lifetime experience for all of them and they remember that time when they were creating the Amiga under the supervision of Jay, as the best time of their careers and the most fun they ever have had creating something new and exciting.
I am sure it was to some. However, at the same time many Amiga developers had already left before 90s and to some Amiga was only a foundation to build something better.