Sure, I agree, snowboarding is like sex or pizza. Even when it's bad it's still pretty good. I had been having the time of my life on a snowboard for 20 years before I got a metal board, but the new stuff is just better. I simply have more fun on it. Selling my new stuff now and going back to the boards I was riding before would be imposing a limitation of sorts on my fun meter, now that I know the difference.
I would say that the new tech is most critical on GS boards, or on less than hero conditions. On great groom, yes, it makes way less of a difference, or no difference, or it might even be less desirable. But those days are pretty rare, at least here. On dicey conditions or if you like to go very fast, you will like the new tech better, and that is that. Even if you don't ride at GS speeds, chances are still very good that you will like the new stuff better. My NSR 185 is simply hands-down better than the Madd 180, Donek 186, Prior 175 I used to own, and the Prior WCRM 187 I demo'd, in all conditions. And I loved all those other boards.