I can relate………..
My denial mechanism that helps me with that, I tell myself I can still get faster.

Yes, I'm one of those that tracks my
PR's on a number of different rides. Why? It is my motivation, my drive, my fun. I like to challenge myself and see if I can beat a previous
PR.
I do one thing that helps as I get older; I keep track of overall
PR's and
PR's for the calendar year. This way, there is always a realistic
PR for me to chase.
OBTW, I also have an incurable prey drive.

If there is a bike, or kayak, in front of me, I must catch it…..Oh well, I have fun with it.