Fair enough, I guess it's a personal/mental thing also then. Technology improvements must help in some areas.
I guess it is a case of 'horses for courses'; if I were doing a reasonably swift (ahem) 40 or 50 miler with other forum members, I'd probably use my SBDU 753 Raleigh Whilst not as light as a carbon bike, it ain't far off. It has lively handling and is great fun to ride - perfect (for me) when I'm not cycling too far and not carrying much gear.
If I were doing a longer ride, with less emphasis on outright speed and carrying a fair bit of kit, I'd have no qualms about using a bike such as Russell's.
On my last CC Ride, I did over 100 miles on a bike with a 531 steel frame. As the ride progressed, so did the realisation that I wasn't as (cycling) fit as some (most
) of the other guys. My lack of pace was entirely due to having done b*gger all in the way of training; had I been on a uber-light, carbon-fibre bike, I don't think that I'd have been any quicker. I found my steel bike (with old & heavy Brooks saddle) to be a very comfortable steed.
I'm not an experienced cyclist; by comparison with most on this forum I'm probably very slow.
What I do know, is that towards the end of a long ride (for me, anything over 70 miles), the last thing on my mind, is the weight or components on the bike . . . . . . . comfort is the primary concern.