Good point. I’ve had shortish (2mile) spins On
Giant TCR carbon
Giant Defy3 carbon
and another higher than ^ (all at the same shop)
The Defy was the one I felt most ‘at home’ on- the Third was race-stiff.
The retro road bike is quite stiff, almost very stiff for an old steel frame but weirdly I like that.
The thing is, I can ride mine and sell it on for similar money. The carbon bikes aren’t 10times better bikes *but I do see/get your point.
When I’m ready- the plan is to upgrade to a decent carbon/Ultegra bike but for now I’m more than happy as its not a 26yr old clunker like you’d think it’d be.