User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-45706392-20201114185543/@comment-1807002-20201114215134

Usually a good tell tale sign they aren't new users is if they remember or talk about Wikia before Fandom. And I see often people still referring Fandom as Wikia or back pre-Fandom days (in comments and feedback about UCP). Which is about 4-5 years ago now.