I think you need to define "quality modern grinder" before making that statement. With the exception of Baldor, I don't believe there are any quality-oriented grinders available new for purchase. If you include the dozens of grinders that were available AFTER the block grinders---ie, Wissota/Milwaukee, Dayton (Taiwan versions), Rockwell, etc---then I agree. But only Baldor has survived, and everything else is just overpriced junk.
Yeah I was more meaning that, and I'd throw in jet grinders as well. No ryobi, hf, wen, grizzly, etc. I've also heard good things about the metabo.
I may have been remiss about the dewalt, but when I used it, it was pretty new and was rock solid. Now its longevity, idk, probably typical chinese trash. I was probably overstepping making that rash comparison saying it killed my craftsman haha, as there's nothing wrong with it and it's a solid unit, although for an inexpensive unit, I'd say it'd get most by.
Like I said, in az there just isn't much of this stuff, and ppl want a small fortune most it of the time, and of course ebay will fleece you, so for cost to performance (and the unknown of what the previous owner did to it or how much it has left), there's some value there with a warranty, new etc.
The market's just crazy here, and most ppl will just go out n buy a jet or a baldor if they want shop quality and not deal with the headache of searching forever and paying inflated prices for 50 year old units (if they don't care of the intrinsic value of vintage units).
I should have been more specific as what I meant including price to performance, market, warranty, average user vs shop, etc.