Got my 1st Amiga when i was 17 in 1990. When it got to the year the PS1 came out, all my friends either ditched the Amiga for the PC or PS1 or they just plain stopped with the whole thing altogether.
With me though however, i just had absolutely no interest at all in the PS1 or PC, and i just couldnt see how anyone could just up and leave a machine like the Amiga?. In the end i stuck with my Amiga till the year 2000 non stop in the hope also that a company would pick up the pieces and move the Amiga forward.
I knew that day would never come so i bought a PC. Still use my Amiga now though
So my timeline was 1990 - 2000. 10 years of constant use from the A500 till 1993, and the A1200 for the remaining 7 years till 2000.