>>1204357Cycling, and especially road cycling, is an incredibly conservative sport. The last major change to road bikes came in 1937 when the derailleur was allowed in the Tour de France. This was also when the last major increase in average speed happened as well. Compared with auto racing or sailing its in the Stone Age. A car driving in Le Mans or an America's Cup yacht would be almost unrecognizable to spectators in 1937.
>>1204363The double action brake caliper that Shimano brought out in the 90s was actually patented in the 1920s.
>>1204371There are really very few innovations in the world that are straight up improvements with no drawbacks. Usually those drawbacks are externalized or ignored however.