Since covid I've been biking to work(6 mos). This appreciable bump in mileage(50-75 cycling) vs (10-20 mtbing recreationally) I know objectively has physically improved me(no duh). While I don't PR every day, I will PR a segment once every week or so. But I'm not trying to PR, it just happens. Even on my mountain biking, I'm PR'ing segments for the first time in 15 years. And I don't think I 'feel' stronger or better. It's just numeric badges that pop up on my strava. I know the party will end and it'll plateau. But for now, kind of enjoying it at the ripe old age of 50.