There is a misunderstanding regarding the difference in quality between Koto-period swords (particularly those from the Kamakura and Nanbokucho periods) and swords from other eras. Practicality is not the issue; a sword is a lethal weapon, and a kazu-uchi mono gets the job done. The difference lies in the artistic qualities of these swords.
That's what I did for many years
Joy, yes. For knowledge, it depends on what you mean by that word. I don't think we have the same understanding of that word.
Absolutely no, I can see when someone knows or don't know. You are far from being in this case. I have no reason to be modest. I know my limits, and you have a very long way to go before you reach them. Am I clear enough?
I don't think Lewis wrote that in the sense that you mean (I'm starting to know him quite well). If that is indeed the case, it's completely pointless.
Now, you're right about one thing: I shouldn't have responded to you.