here is my 20 year old Shimano 105 brake caliper
Sure, I have some of those too (and a box full of 600 Tricolor that look just as nice). No question that the stuff that was
made 20+ years ago, painted or polished, is holding up fairly well (although it breaks my heart to see the condition of some of the RD's I come across- they look like they were dragged through a cornfield behind a truck). But it will be interesting to see whether what's being produced
today looks as good in, oh, say 2030.
Or maybe I'm just a grumpy old coot.