For me it was 1996, most of the most beautiful bikes were made around that time.
The older bikes were just built better, they shifted more reliably, and they were lighter too, the anniversary yeti arc weighs in at around 25lb. Even thought it’s made of carbon, the older one weighs in at around 22lb even though it’s made of steel
Right around the 2000s was when the “copy craze” (just my word for it) kicked off. All the smaller bike manufacturers just went nuts and started making some terrible bikes e.g. Apollo, muddy fox and Saracen.
However there where some unforgettable dh monsters made around that time like mountain cycles, and sintesi’s
But I’m the 90’s nearly every bike was handmade, brazed/welded by the creators hand. And you just didn’t really get that kinda soul in the bikes that you can buy today. It’s all machine welded and it just doesn’t feel right.
The bikes made now are more easy to race(in my humble opinion) you know, you’ve got boost, bigger suspension, wider bars. When In the 80s/90s the rider was actually connected to the ground.
Anyway that’s my verdict