Yup! I don’t understand the downvotes, because this absolutely happens. Especially when technology has progressed to enable us to answer certain questions that we couldn’t in the past. Old curmudgeonly academics can definitely be resistant to accepting that they’ve been wrong, even when confronted with proof. Sometimes the only way for old theories to die is for their proponents to die or retire. It’s a shame, but ego can be a massive problem in some disciplines.