Not going away here in Wyoming. It's become the single most popular job for a re-barrel for me in my shop in the last 2 years or so.
One little niche is the LH market. Left handed shooters have discovered that any 30-06 LH gun can be re-barreled to the 9.3X62 easily and fairly inexpensively and they end up with a shell that come very close to a 375H&H in it's abilities to kill game, but is a long way from the cost of a LH 375.

My 9.3X62 reamer gets a lot of use here.

I made myself a 9.3X57 and I also traded for another one. I have shown my 2 rifles to several hunters and I was surprised that 3 of them so far decided to have me make them rifles in that caliber too. Loaded in a strong action it will beat the 358 Winchester in every way, and again is fairly inexpensive to make. I form my brass from 8X57 in one pass and it works perfectly.