WTF? We painters do talk about brushes. Painting is a very physical medium, and I have had many conversations with other artists about a gigantic range of issues particular to slapping paint onto canvas or board: binders, studio lighting, toxicity, just to name a few that immediately spring to mind. And we most definitely discuss the inadequacy(!) of our brushes. I suspect watercolorists are the worst obssessors about brushes, and I'm not in that group.
I have a D40 and a couple of MF cameras. The D40 is a competent little machine, but it's not nearly as much fun as my SLR/TLR MF cameras. I like my D40; I love my Rollei. That said, I could get used to a donated M8!