1) Apple deletes associated data when the user turns Siri off. 2) Apple dis-associates data after six months. 1 & 2 = data older than six months is not delete

1) Apple deletes associated data when the user turns Siri off. 2) Apple dis-associates data after six months. 1 & 2 = data older than six months is not deleted, bit is not directly associated with you. So that Siri search for that topic only of interest to communist homosexual terrorist Jews will not have your user ID but might still be identifiable from voice analysis. You can't escape Macarthyism that easily.