Not me. I tend to buy 2 and 3 year old technology. I am a cheapskate. Several reasons for it

1 - 1st and sometime 2nd year productions are out there to work the bugs out. When I am doing 45km/hr on a dh course I don't want to find any bugs.
2 - I am inherently cheap. I can own and ride 3 bikes because of that reason. If I kept up to date on parts for my dh rig I would never be able to afford to eat let alone ride 3 different disciplines of dirt.
3 - I don't buy into hype. Most things that are latest and greatest aren't. They are lateral moves. Slighly improving one thing but sacrificing somewhere else. Mabe save a gram but become 1% weaker. I like my things to be proven.
4 - I buy things I need. If I don't need it. I don't buy it. Excluding one part. I bought a special stem for my dh bike because it is sexy.