I'm 35 and keeping it alive. I have many semi autos (FALs, AKs, etc.) but I also have a love affair with the old military guns. Locally though, it is kind of dead. I feel Arizona is a more modern black rifle type of place. Gun shows here in both Phoenix and Tucson are evidence of this. Tons of junk AR parts and rifles, very hard to find decent misurps. The few Mausers and Enfields that you do see are usually in pretty bad shape. Sometimes there will be tables with Garands and 1903s which is good.
When I lived in PA, the gun shows there had many people with G43s, snipers versions of Arisakas, Garands, Johnsons, Winchester 1897 trench guns. Of course those are cost prohibitive, but it was nice to see these uncommon and examples around and appreciated.