Agreed. I bought a mid-range Nikon DSLR a couple of years ago (after having spent many years in film photography as a Nikon guy), but I end up still mostly using either my aging Canon prosumer G9 point-and-shoot or the cheap cell phone that's in my pocket.
Sadly, my old vintage Nikon lenses aren't nearly as useful as I thought they would be because even though some are nominally compatible, you give up so many automatic features that even those aren't very useful. So much for Nikon's famous backwards-compatible lenses. I haven't invested in modern Nikon lenses except for the ones that came in the camera kit because I'm not a serious enough photographer to fork out the dough.
Given all that, and since most of us already have more megapixels than we ever need, there doesn't seem to be much reason to buy any new digital cameras until one breaks.
I had better luck using my Minolta Maxxum lenses on a Sony Alpha I bought recently. That's no accident though, Sony purchased all of Minolta's tech when the latter exited the photo business.