Saubier is definitely a web site for shooters with narrow interests. I cruise by there occasionally to search for information on rifles and cartridges 22 caliber and smaller. Most of the time I find what I'm looking for in terms of answers. And I have never thought of it as being or wanting to be a large volume board. It is what it is.
Over the years I've gotten the impression from reading there that many of the older posters are indeed older. That's not a bad thing at all. It just helped to set the culture that exists there. I think that many of them grew up in the wildcat cartridge era when not everyone wanted a plain vanilla whatever that you can find at Walmart.
One thing I seldom or never see there is anyone asking for validation for what they bought or the ever-popular "help me choose my next rifle" threads like you see here regularly. Most posters there just tell it "like it is" for informational discussion purposes and let the chips fall where they may. And they have actually done what they are reporting about versus a common theme here where some of the experts began with , "I read......."
There's lots of good information floating around there that you'd never find here.