Short answer: I don't look at the clock and don't have a speedometer on my bike.
Longer answer: I used to get a little thrill when my Strava app showed a new PR on a segment. The problem is that three years ago I massively trained for the Markleeville Death Ride and rode very hard on every single route around where I live. Since my conditioning has declined from that massive effort I almost never get a PR any more. I've realized that this is going to happen to everybody eventually. As we get older and our lung capacity and strength inevitably decreases there will come a time when we receive our last Strava PR. It seems to me that it would be good if Strava had a reset for PRs, etc, so that you could go back to zero each decade or season. I realize that I could just delete myself on Strava and create a new login, but then that would delete the record of all my prior rides. I wouldn't want that.