The dilemma of change seems to be "you're damned if you do and damned if you don't." When someone brings up something someone said last year, or 5 years ago, or 15 years ago, and ignores what they are saying today, a fatal flaw is exposed. Not in the person being trashed for past missteps, rather in the person doing the trashing. When this happens to me (and for sure it does), all I can say is I have changed, evolved since then, have you?
Being of a fixed mind has mixed results as does being too pliable. I guess wisdom is knowing when to be which.