Speaking only for myself, the cues I make today are advanced compared to the cues I made in the beginning. If I weren't getting better with time and experience, then something is wrong. That's not to say my older cues are bad or that anything is wrong with them. It's just that as I gain more knowledge, I use it, and I'm constantly striving for more. My cues also change with me as a player, as they should. I may not play as fast and accurate as I did 15yrs ago, but I sure know a lot more. Aside from my knowledge of the game evolving, so does my knowledge of woods, construction, dynamics, etc. So again, I like to think the cues I make today are superior to any cues I have ever made.
All that said, a 1989 Chevy Camaro is technologically superior to a 1969 Camaro, but which would you rather have? That ole 69' sounds good, drives well, is loved by all who sees it, and constantly gives you thrills that the 89' never will.