(mr mc posting)
old Marz stuff- '99Z3 still in regular use on its third owner, with nothing but regular oil changes (still on orginal seals and bushes!).
old old Shimano stuff; M-C's 1994 Kona's shimano thumbies still work perfectly (and with an 8spd block due to shimano brain-farting and putting 7 indexes on a 7 speed shifter).
1998/99 Camelback Mule still my main riding daysack, had a new bladder or two but thats fair enough.
1998 Diadora Chilis finally just been replaced after hitting a rock and tearing the side (only just kept my little toe).
Old Fox stuff is a different league to new stuff. My 2000 Sidewinders are still going strong modified as short finger gloves (having torn the finger ends), but their newer "replacements" are far more fragile and shed armour (glued not stitched on now cut cost no doubt) and come unstitched in one season.
Put me down as another who bemoans expensive ISIS, and now external BBs not lasting anywhere near as long as the far cheaper old square-taper stuff…
Bit of a codger theme going on, older stuff was better, or at least more durable.