>>1375342Eh, bicycles has
1. Changed form factor from gigawheel and small wheel to uniform diamand frames
2. Brake systems has gone from tire brakes, to rim brakes to disc brakes.
3. Internal hub mechanisms used to be popular, due lack of maintenance. Sealed systems in oil and lube, still a thing
4. Frame tech has advanced somewhere, but there is no demand to get Carbon Fiber for normal bikes
5. Wheel tech hasn´t advanced since vulcanized rubber became a thing