This is the crux, for my mileage. Yes, many Bordeaux from 1995-Present are great wines and many are aging well. Even 20+ years later for many of these vintages, however, it still isn’t clear that they’re developing like vintages from the 80’s and before did/are. A bunch of the possible culprits for why this could be have been articulated beautifully in this thread (brett, elevage, vineyard practices, climate, and more).
I think even many of the ever-scarcer traditionalist Chateau taste different now that they did 25 years ago or more— perhaps only Sociando Mallet hasn’t budged at all, but even redoubtable estates like Leoville Baron, Montrose, PLL, LLC, etc. are different today in subtle ways, especially in the tannins, brett, acids and things like ultra-low oxygen exposure during elevage.
Perhaps these will still blossom like the 80’s wines have, they’ll just take longer due to better storage and purer fruit? As a point of reference, we did a big 86 Bordeaux horizontal in 2008 in NYC with all of the top wines from the Left Bank, and at 22 years these wines were all showing wonderfully even if some showed they’d get better for a long time. In contrast, the 95s and 96s from the same estates (now basically the same age as the 86s in 2008) are still so young, “pure” and almost grapey for my tastes. Maybe that “incredible” purity so many critics go on about isn’t such a good thing after all.