The question assumes you went from amiga to a PC or Mac (sorry, Franko
)
What was the amiga OS you ran, at the time your amiga was no longer your primary computer?
wb 1.2 on a1k back in '93 or '94. (first pc 386dx/25)
What do you run on your main amiga today? (whichever one you use the most)
wb 3.1 on a3k. (sadly said machine is no longer functional)