JiffyPopTart
Bree-Yark
From a game design perspective it is a big improvement to standardize your system so that you always roll a D20 and higher is always better.I do think this metaphor misses the mark. The only thing old cars have over new cars is that they're theoretically easier to repair yourself. In every other regard- speed, performance, safety, comfort, (etc.) newer cars are really just better.
I think some old games are bad designs, but some are good designs that simply do different things than newer games. I get good but different play experiences from 5E or B/X, for example. Both are excellent games with different virtues.
So big a difference that I maintain 5e is a simpler game than BECMI.