Tyre moaning is just another excuse – “oooh I would have tackled that section fine with my Mud XXXX badger print thermo gripper tyres – must fit them next time…”
Same with the vast variety of MTB categories – “dammit, I needed my 20″ full sus rig for that DH bit and my 16lb super rocket whippet for that bit”
For me, its not really about excuses. I don’t need to make excuses, given my limitations as a distinctly average rider. Its about gaining an improved advantage for the conditions, and more confidence, plus a dollop of ‘I wonder how this tyre works?’. I’m no racer by any means, but I like to be able to have the best balance of grip and rolling resistance for the conditions. Who wouldn’t?
That said, I don’t specifically change tyres for individual rides. I don’t go further than changing for the drier and wetter parts of the year. Dry-intermediate for late Spring, Summer and early Autumn, and wet/intermediate for late Autumn-Winter-early Spring.