That whole period of the PC industry where 'multimedia' became mainstream was pretty magical. I know the Amiga was well ahead of the PC ecosystem for a long time in capability but it never hit schools (at least where I grew up in South Australia) like PCs did. So with the emergence of VGA and Super VGA, widespread availability (and relative affordability) of 486 DX class PCs, Soundblasters and Optical Drives, the PC…
Although I suppose the 486 came out in '89, it was rare to see it in the schools that I went to, or in my friends' homes. Similarly with VGA and SVGA (and decent sound cards!), it took several years to become affordable and mainstream. But when they did, and when Pentiums started coming out, it was pretty much the death knell for the Amiga. I recall somberly looking at benchmarks of 486s, and comparing it to our pride and joy, a 68030-upgraded A1200, and realising that it was a losing game.
So you are absolutely right, though I think the timeline is probably a bit shifted depending on the country / economic conditions.