How do we know for sure that modern capacitors are better than those made in the '90?
Well technology has become better, so they should be better, last more with better specs, but if I look at a modern capacitor, it seems way cheaper than the old one. Especially if you compare a vintage audio capacitor made in Japan, with a new Panasonic built somewhere unknown..
and there are a lot of horror stories, with new capacitors failing way before 10 years.
Modern caps are physically smaller than older ones, that's just progress.
Mouser states quite clearly on their baggies where the capacitors they sell come from. Nichicons that I use tend to be made in Japan or Malaysia.
Lee.