I consider myself a 43 year old "newbie". I've had several old timers on here help me through varous problems, usually in PM's. Still some incredible folks on this site.
And, I think there is some cutting edge information still being researched ie damascus, barrel wall thickness, finishing methods, and historic information on our favorite guns. Enough that it's still interesting.
So...I think the glass is half full

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I come here to learn about working on junkers and double guns in general. I mostly do this to get away from the daily garbage going on in the world. I try my best to sort through it here.
But, I do wonder in 20 years if anyone will care about these old guns like we do right now. Hard to know, but I doubt it.