I don't know how often or on what grits he does so.
One of Mr. Sellers videos made me lose any credence in his 'teaching' abilities. It has him saying one only needs to hone their blades up to a 220 grit because that is where people stop sanding before they apply any finish.
There were other videos of his that also made me think he doesn't have much of value to help me.
As stated before, more than one of my posts has contained comments about how a convex bevel may be useable, but it is surpassed by almost all other methods.
One piece of literature suggests in the early days of Sheffield tool makers tools were hollow ground because the workmen at the time would refuse anything with a convex bevel.
Often the "quick and easy way" can lead to learning bad habits.
jtk
"A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty."
- Sir Winston Churchill (1874-1965)