Original MediaWiki developers like Tim Starling and Brion Vibber aren't total assholes and can actually code. Wikipedia would not exist today if not for them. Ultimately it will not matter. Chances are good that they are already being pushed toward the door, and probably have not realized it yet.
Since the WMF has become a nonprofit money trench, I expect the good ones will eventually be forced out, no matter how good or valuable they are. Any value-adding work they did in the past will be forgotten as outright incompetent parasites take over Wikimedia software operations. This is a commonplace HR-caused weakness with successful nonprofits generally. Assholes get in and hire their asshole friends and compatriots.
As long as they can keep lying to the general public, so the public continues to use WP, and thereby are forced to see the endless banner ads begging for MO' MONEY, the liars can keep the little dirt empire going. And James Forrester (the ultimate Jimbo parasite) will stay attached to the Wiki-Carbuncle. If HE ever bails out of his six-figure job at the WMF, THEN you will know they are in real trouble.