Good point Herb. I ruined a blade like that before I took the time to learn about the right blade for the right application. I do have a tendency to get lazy about changing blades sometimes but I leave my rip blade on to do multi tasking with the TS, not one of my finish blades or crosscut blades. I also keep some blades that are too crappy for nice jobs and switch to them if I have to cut something that's questionable (as in dirt, grit, or hidden metal).
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.