While looking up reaction wheel info I came across this question: Optimal placement of 4 reaction wheels? and would like to see if there is more from the user who is now gone?
Stack Exchange Data Explorer might at least help; you can search posts by the deleted owner's display name.
SELECT Id AS [Post Link], Score, Body FROM Posts WHERE PostTypeId <=2 AND OwnerUserId IS NULL AND OwnerDisplayName = '##DisplayName##' ORDER BY CreationDate ASC
(not tested thoroughly, might be buggy)