Ethernet evolved in backward compatible way for more than 30 years. If we would design a new standard from scratch to fit the same use cases we in theory can le

Ethernet evolved in backward compatible way for more than 30 years. If we would design a new standard from scratch to fit the same use cases we in theory can learn from the experience and improve things but at the same it would be hard to resist a temptation to make it future-proof by adding a lot of things just in case and this new standard likely will be even more wasteful. And having opportunity doesn't mean it will be used. I often see new design make mistakes avoided in older designs because people have limited time to learn and body of knowledge is too large to always successfully learn from the past. Also hardware is not like software where you can rewrite a site using a JS framework of the day every few years. Compatibility is really important.