Stumpy Nubs Video - Do you flat or hollow grind?

[Andrew Hughes]

I also hollow grind most everything except my Japanese chisels. They are very easy to sharpen and the steel is very precious.
The carving knives I use are repurposed pocket knives so hollow grinding makes them easier to sharpen on the stones. Just the same principle as plane blades.
Hollow grinding has been taught way before the internet YouTubers were born.
Good Luck