I'd like to throw in my unsolicited support for a 1E hardcover edition. Yes, I know that I can get pdfs for Kingmaker but I don't enjoy running my games while using a pdf. I like having the physical book and the physical copies for Kingmaker are out of print and difficult to get (i.e. expensive).
The argument telling people to move on to 2E really reminds me off the D&D transition from 3.5 to 4E. Paizo was able to step in and fill a gap because there was a sizable demand to continue supporting 3.5. It seems to me like the same type of thing is going to happen with Pathfinder 1E if Paizo chooses to not end support for 1E (which after June, I think they are)