I have to imagine a lot of this is due to how many of the new makers simply can't fit guards, bolsters, or finish blades.
As I mentioned in your thread on mirrored blades, I do it. If you go by the trends, my using knives are definitely outdated. Mirror finished hollow grinds with tapered tangs and dovetailed bolsters aren't seen too much these days, but that's pretty well what I make for using knives. I'm sure that stems from the makers I've always looked up to being guys like Loveless, Hale, Warenski, ect.
Clearly there must still be people who like them as I can sell them as fast as I can make them. Although interestingly I've never been able to sell the trendy sharpened prybar stuff to save my life.
I've noticed a very slight resurgence recently, and traditional knives have been becoming a bit more popular too. Maybe the market is on its way to correcting.
I'm not sure that the sort of traditional stock removal knife ever really stopped selling, they just became a bit less mainstream. Despite what trends may be, there is always that portion of people who like shiny things