Originally Posted by
skidder
Round metal tube frames were used in UCI races up until about 2000 (aluminum), and some aluminum bikes had aero-shaped frame tubes (Trek's "hydroformed" tubing comes to mind) but a lot of other features on bicycles have changed since the 1920s, too. You can still buy a metal-framed bicycle but its not going to have the cutting-edge components on it you'll find in more modern bicycles. For comparison, have you ever tried to drive a 1920s car versus a 2020 car? It's a world of difference. If today's cars were made like those of the 1920s very few folks would be driving them.
That is simply incorrect, cutting edge components go on any frame.
lots of production titanium, aluminum and steel (all metal framed) bikes out there with disc, electronic shifting etc
that is not even taking into account custom frames (I ride a custom steel with R8000....that was a choice I could have gone disc and di2)