This reminds me of a thread we had a couple years ago about old design that we still love. It’s really hard to innovate on the bicycle without eliminating what makes the design so great. If you change the frame, you have to use exotic materials that increase the cost. If you try to eliminate functions, like rim brakes, gears, you decrease the usability of the bike.
The traditional triangle frame bike with derailleur and rim brakes is an incredible testament to human’s machine making ability. We should appreciate it more.