No, whatever happened in the early 90s has to start a "new age" from copper, the question is whether they next "age" should be ending at some point in the 90s (a short age, the chromium age maybe, from 1991 - 1998). I'm not sure if there is an "event" that can be pointed to, but in 1999 things start changing a lot, only a couple of books a month go over 100K, DC takes the lead on Marvel in overall market share (according to comichron... which is weird because DC often only had a few titles in the top 20, not sure where they are winning looking at comichron).. 1999 to some point in the 2000s is maybe pre-modern, when did variants become such a huge part of the business model? I know they've been around with "platinums" and such, but they were not such a big part of things until some point in the 2000s. the 608 rrp variant might have really started things, but that was not your typical store variant