To address @tomek's point here: https://phab.comm.dev/D9402#276831
Went ahead and added all the actionTypes for that could include ClientUpdateInfo. @tomek wanted to get your thoughts on this approach, or if I should just add processUpdatesActionType.
Added an additional filter check to see if there were any DELETE_THREAD updates before creating a new state object as an optimization since presumably this action handler branch will be hit more times now.