He didn't stop personally, just professionally. In the 1990s Gates would write articles about various personal programming projects -- the last one I can recall

He didn't stop personally, just professionally. In the 1990s Gates would write articles about various personal programming projects -- the last one I can recall was in Java. (This was back when Java was the next big thing for MS, so certainly there was marketing aspect to this too.) IIRC it was about home automation.