By peering older days from the usenet itself? Doing it from nzbs could also be something. There is a lot of old content at many indexers.
The major reason I feel trapped to Omicron is that I enjoy (no so much) cult content from every possible place and language. And a big part of it is 2008~2013.
I see all the NewsDemon advertising and way to do business and I feel sad to be unable to just drop omicron for my use case.