Gall's Law (complex systems)
"A complex system that works is invariably found to have evolved from a simple system that worked. A complex system designed from scratch never works and cannot be patched up to make it work. You have to start over with a working simple system."
- articulated in John Gall's book Systemantics: How Systems Really Work and How They Fail
This applies to Bitcoin (the most inelegant of the cryptos, and the most likely to have staying power), cities (Paris vs. Brasilia). I encountered it here