TomD
""You said, "...No I don't see any problem other than the usual problems that occur with hollow grinds or double bevels..." and I asked what those were."

Yeah I was trying to hint that I acknowledge there are different opinions on this stuff but would prefer not to get into it.

"I can think of three so-called problems I see mentioned:

1. "It wastes steel." Those who think this don't understand that grinding is done only to reduce the size of the honed bevel unless some damage is done to the edge through abuse."

Or they understand that the steel is removed more quickly using this method so one is more likely to overshoot than on a method where that is not the case, and one is more likely to underpolish since whatever level of abrasive is being used will cut deeper on a smaller surface. My O1 chisels cost under a dollar to make, but you can spend hundreds on a chisel, and some folks who are actual producers do. You have be thinking in those terms.

"2. "There's a risk of over heating the steel." Yes, there is that risk but there's also risk in using a table saw or even using a sharp chisel. Reduce that risk by learning what you're doing and maintaining your equipment."

Or the person who knows how to use and maintain the appropriate gear could get out of the dark ages and use one of the many power systems that cuts faster than grinding and hand jigs and delivers as good an edge, without undercutting it, making parts of it rough, etc...

"3. "Hollow grinds weaken the edge." If so, it's negligible. I've used hollow ground edges daily at work for more than 30 years and broken two tool's edges. Once was prying with a carving gouge when I knew I shouldn't and the other was tuning up a vintage craftsman-made plane for a guy in a workshop. The iron was made from a file and I have no idea what was done in heat treating that iron but it was the most brittle and coarsest grain steel I've ever seen. I had trouble with it crumbling during honing and once I had what looked like a good edge, it shattered on first contact with wood."

It's not the thirty years you spend, it is what you spend them on. Most people don't care a lot about details in most things. And care a lot about details in some thing. So for instance you write lyrically about the benefits of beech, and have spent a great deal of time researching "unimportant" differences among traditional plane makers. But when it comes to blades you use O1 which is a shortcut. I personally like O1, It's like arguing over MP3s, vinyl, or cds. Somewhere someone cares a lot.

"Are there problems other than these?"

Yeah...