I'd tell you to go back and read the rest of the thread as to how that goes, but you're just here to dump on me so why would I bother?
The two relevant points.
Natural upgrade path.
If my K-3 dies first, I'll get another K-3. The K-1 is only worth it to me as the second body in a two format system that uses all the same lenses. I currently have my K-5 as a backup. The K-1 sort of has a K-5 built in.. A K-1 is a piece of nice to have fluff, but not at all necessary.
Same as before, nothing has changed. For a single format system user, it's still APS-c all the way for me.
The thing that has changed is, I'm I can ad a second body to an existing system, with none of the costs of a whole second system, and without having to sell any of the gear I've spent a long time learning how to use.
And I always said "I'll never buy an FF, until the day I say I will."
You've not been paying attention.