I just purchased my first pair of dedicated use TS blades, two Freuds a glue line rip and an 80 tooth ATB crosscut. Personally, I don't have a problem switching out blades when necessary.
I just now thought about a friend who I am helping get started in wood working and who frequently uses my shop. He is not the most careful of people. How concerned do I need to be when he starts ripping with the crosscut blade. It seems like it would be worse on his wood than my blade, but I also don't want to have to be sharpening three times as often.