They aren't dead. One of my bikes is a 1995 Y-22 reborn in 2009 to live again. Found the freshly painted freshly pivoted frameset with Alps4 on CL for 150.00. Decided to build it up. Full Deore 9spd rapidfire mechanical disc/deore V with Rockshox Tora32 RL
fork with fatboy extra firm ride coil in it & WTB seat/velociraptors. Been XCing it since then when FS is called for. Has been a great throwback historical ride. Pretty effective for how old it is with it's single pivot self. I'm sure there are more still around so post up your guitarbike................