When I only had Open Pros, I just rode those all the time, and changed the tires when they got old.

When I raced on fancy tubulars, they were race-day only - mostly to save the tires, but also I didn't want to flat while training on them (and get stranded).

After I got tired of paying a lot (of money & time) to fix a flat tubular, I got a 404 clincher that I use for racing and training. And I throw the front 404 tubular on for races - once it flats I'll probably get another 404 clincher for the front. **** tubulars.