Rich - I suspect the older carby bikes ride so well because they didn't have to comply with ever more stringent emission controls. That hasn't really got anything to do with technological progress and it's more about strangulating engines because that is what society wants. The DCT hasn't got anything to do with that. There are many other tech advances that undoubtedly improve the ride. Brakes for one thing
My 1960's Triumph 6T was a pig of a bike. It had a floppy frame (the Bonneville wasn't much better), twin leading shoe brakes, a tickler for heavens' sake to get the engine going which was done via a kickstart. ..... but it was simpler.