New Blacksmithing Questions

I have started playing this xpac and I was hoping to make some money, so I’ve started learning blacksmithing. I’ve heard resourcefulness procs and tips from making weapons can help pay for repair costs and flasks. I have a few questions, though.

  1. What happens to knowledge/recipes in s2? Obviously no one will want a 636 Everforged Longsword then. Do they get automatically upgraded or will I need to learn more stuff?

  2. Is there some sort of catchup mechanic for knowledge? I bought all the knowledge I could, and did all the patron orders I could.

  3. Is there a good (recent) guide that can help me accomplish my goals with blacksmithing and understand this whole system better?