I’ve not even started cellaring Bordeaux when the youngest of our flights were released. I will attempt to speak for most in the group, but given their general non-geriatric looks, I will assume that the bottles were not bought and cellared since release. Please chime in if I misspoke.
But, as noted in a good comment by Robert above, and as you are already well aware, we are quite blessed with local sources of well-stored mature Bordeaux, with, of course, some luck thrown in to get a perfect or not-so-perfect mature bottles and, in my case, persevering with merchants where I’ve had mainly positive experiences with in my past purchases. My ’90 Canon was in my cellar over the last 5 to 6 years and was part of a multiple-bottle purchase from several years back from an out-of-town merchant and I actually still have a bottle left. The ’90 Magdelaine was from an auction win from about 3 years ago.