While this is true, newer bikes and designs do give you something older designs couldnt (as a generalisation).
My 1970/80s 531 Clubman is supremely comfortable, smooth, as fast as new bikes...but noticeably smooth. like velvet.
Why ?...its a relatively long stretched out bike with, compared to modern bikes, a huge fork rake. That gives you a very smooth ride, like having suspension. Modern bikes forks are much straighter (certainly older steel ones) which transmitted all the bumps straight up to you. Now we have carbon forks, we're getting somewhere near the comfort old raked forks.
But, the Clubman is (IMO) a tourer. Commute on it in traffic, its bloomin awful, like steering a battleship. Thats the rake again, plus's and minus's. You don't get that on modern 'racers'.
There's always a compromise, you gain in one hand, lose something in the other. We're probably at the nearly perfect position of having Sportive bikes now, taller headtube for comfort, without sacrificing much aerodynamics, carbon forks that are as comfortable as old forks, but with the added bonus of instant response (which some people call twitchiness...but that is just something you have to get through and get used to, after a while...its perfectly ok)
The worst time (IMO) was forks you got in the 90s, i remember my Raleigh Chimera, relatively budget bike, dependable, strong, but it had chro mo forks, straight as a die, you felt every lump and bump you rode over. It was like a bone shaker (but i still loved owning it).