Thanks for your work, Erik. I hope that we will see you in the future.
This is the first time that I can recall hearing about a person retiring from WMF. Volunteer retirements and semi-retirements happen regularly, and the reasons that I hear for those retirements are often sad. It's nice to hear of someone who is retiring after years of success and is moving in a positive direction.
I think that you leave a good legacy in the Wikiverse, and as you might guess from my username, I like what you chose for your next project.
Best wishes,