pass (one's) sell-by date

To go past one's peak performance, ability, or usefulness and into a state of decline, especially due to age. A reference to the date marked on a perishable product indicating when it should no longer be sold. I think it's important to throw in the towel when you pass your sell-by date. There just came a day when I realized I had passed my sell-by date, and that I could no longer perform my duties as the company required.

pass your sell-by date

reach a point where you are useless or worn out. informal

A sell-by date is that stamped on perishable goods indicating the latest date on which they may be sold.

1998 Spectator He would probably have to turn on them [his colleagues] when, in his view, they had passed their sell-by date.