ME: *points at my "World's Greatest Dad" shirt*
CO-WORKER: *points at his own "World's Greatest Dad" shirt*
ME: *takes a sip from my "World's Greatest Dad" mug*
CO-WORKER: *sips from his own "World's Greatest Dad" mug*
ME: [eyes narrow] *draws "World's Greatest Dad" sword*
There are a few people in games that are so singularly stable that any change to that will send ripple of concern or consequence through the industry, and very rarely will anyone outside of game dev know their names. Sjoerd choosing to leave Epic is definitely one of those moments.