My brother and I saw F-29 Retaliator demoed on a PC at a local computer shop in Honolulu, 1990. The silky smooth frame rate was a “writing on the wall” moment for me, not just for C64 but even for Amiga. That and the fact that all the hot new Origin games were launching on PC by then.
I was pretty much done gaming by 1992 (freshman year college) and didn’t get back into it seriously until 1999 when I finally purchased a relatively state of the art PC.