So much for the "that type of grind can't cut well" idea, right? I know there was a thread that thick-spined knives don't cut well, but that hasn't been my experience at all. The MONSTER-spined Gesshin Hide gyuto I tried was going through almost everything with almost no effort. It really blew my mind how well it cut even sweet potatoes. My Heiji is another example of a thick-spined knife that seems to do ok.
I can only think of wanting a super laser (even less than 2mm at the spine) for the densest and largest sweet potatoes, beets, and parsnips.