Mid ride a few days ago my front shifter got very erratic. Couldn't shift from big ring to small unless I fiddled with it. Never wrecked, never dropped. Etc. About 7 years and 25-30,000 miles on it.
LBS mechanic nor owner could figure it out. You can see the little lever thing sticking out. That is supposed to spring back, but doesn't. If I move it back, it works. He called Shimano and they had not seen that problem either, and suggested a new shifter, maybe do both since same age.
Of course: Back ordered
Of course: Weekend ride scheduled with back to back centuries.
Of course: $365.
Oh well, it's only money.