A lot will depend on the person and the environment. I've been riding "Road Bikes" for nearly 50 years, and am not going to change any time soon (although I do have a variety of bikes now).
I haven't raced since I aged out of being a "Midget" though. I have thought about TT's or perhaps a race on a local auto race track, but need to get myself faster.
I'm down a bit on miles at the moment, but it will come back. A typical shopping/commute ride would be about 30 to 40 miles. And my longest commute was about 200 miles.
Not real fast, but keep plodding along.
I posted the old, and well worn Colnago Super earlier (
Post #8).
The C40 crosses the line between Classic and Modern, but it is sweet to ride!!!
I met a neighbor that had had about a half mile hill climb at about 10% up to his house. Maybe 75 years old. He had a very nice carbon fiber bike, and mighty low gearing on his bike, but would do the ride up the hill.
Anyway, as I get older, I can imagine wanting a lighter and lighter bike.