Thanks for the feedback!
The pulleys on the Kona are getting very 'shark-toothed'; so I'll replace those when I get the new cassette and chain. Otherwise, I'll keep running the original derailleur.
I have destroyed derailleurs; my Campy got a twig in the cage and turned itself inside-out:
Believer it or not, this one survived and is still rolling 5 years later - Lisa's Marin with out-of-focus twig still in the cage:
