https://www.gamespot.com/articles/bungie-layoffs-include-senior-execs-luke-smith-and-mark-noseworthy/1100-6525488/ They were reportedly working on Payback, and as it was shut down and Bungie went through leadership restructuring, they both had no path forward at Bungie, so they left. Even they were hit by whatever the heck is currently going on at Bungie. I've seen it speculated this is the start of the dissolution of the board as per the acquisition.