The the thing southern yeti, i ride my bikes loads and i am a good rider :P. actually that is not totally true at the moment, i ride my hardtail loads.
I’m of the belief that it is the rider not the bike . my mate who is the best rider i know (used to race national dh), rides probably the cheapest bikes out of all the people i ride with and will never by anything new unless he has too.
I used to work in a shop where the guys would talk about and own really expensive bikes, but never ride! I would always be going out and couldn’t understand why they didn’t want to ride their expensive toys.
both my mate and the guys in the shop obsess about bikes, but one is an amazing rider and the others barely ride.
i dont for a second think that a new shiny bit will make me go faster as i know it wont, but still lust after different bits and pieces.
part of it is gettting back into riding after 15 years and now actually being able to afford the things i couldn’t have as a kid, but i think that mtb’ing disease exists no matter how much you ride or how good you are :-)