TBH, I don’t recall anything fundamental changing towards spine leading coming out of “this” conversation back when it was going on with Mr. Carter. And i think everyone was watching it unfold given the players. There was lots of discussion that you can go back and reread.
It’s been too long for me to recall the follow-up back and forth that went on.
There are some interesting things you can learn from Mr. Carter. For one, he talks about using newsprint for stropping. That is certainly worth knowing if you get caught without a leather strop. However, he is more of a knife-smith than a razor- smith. Also he likes to do stunts like shaving with a sharpened tablespoon or axe. I would not want to try shaving with one of his edges.
His methods are highly controversal in the shaving community. I am not saying you should avoid his videos, but I am saying you need to keep them in perspective when viewing them. If his methods work for you, great! However, if they do not work, do not think you are doing something wrong.