I'd also consider riding position of older bikes vs newer ones.

Seems to me, people riding newer bikes with brifters and ergo bars always ride on the hoods. On older bikes, riding on the hoods is not always ideal. I find (on my narrow handlebar 1972 PX-10) 4 positions: drops, hoods, flat/center, and bend (between the hoods and flat/center) (sorry guys, I know there are technical names for these positions). Most of the time, I am on the drops (which I find very comfortable), bend, and flat, and very little on the hoods. I'm a big guy that would probably want a wide bar on a modern bike, but am totally fine riding this configuration.

Maybe this difference is adjusting the positioning to the narrow bars?

Here is a photo of the 4 positions I grabbed

hand positions.jpg