Yes, I have a separate race bike, I do occasionally ride it while not racing but that’s normally when I’m testing a change or after fettling/replacing something as a shakedown ride, as the whole point of it as a race bike is that it’s always ready to go, no surprises, and no chance of crashing on it and busting something the day before an event. It’s a 26er plastic fantastic frame from china built up with Rebas and some older XTR and XO stuff that is super reliable and reasonably light, frame was cheap but light and rides well and the theory being that if I do bungle it in a race it’s easy to replace, the goal was lightish but reliable rather than super light.
Sure it’s not riders who happen to be on 29ers who keep pulling away from you
This, the miniscule differences between a 29er and a 26er on some courses is easily overshadowed by variations in fitness and skills, unless you are coming 2nd or 3rd in every race and being beaten every time by a guy of equal fitness but on a 29er then I think you’ll find the wheels or bike would make less of a difference than you.
I have no doubt that 29ers *are* faster on average, but I’m still not going to swap until I’m sure its going to give me a bigger advantage than just getting fitter, I generally place top 10 overall and top 5 in Masters when racing XC locally, and yes, the guys that beat me are on 29ers, but so are most of the guys behind me, I know there’s more performance to be squeezed from me by getting fitter than I would get simply by swapping to bigger wheels at this stage, and I doubt I’ll ever get onto the podiums so for me a race bike is about having a bike that I know is ready to go and working, rather than a constant upgrade for a faster bike.