Saw one at an air show. The pilot got it to basically hover nose up.
Part of the purpose of military air shows is to penetrate the thick skulls of domestic communists with violent sonic boom reality. The message is: don't even think it. Real Americans are entertained because there's a competent American pilot onboard. Now imagine the same intense flying performed instead by a soulless AI pilot. That demonstration of acrobatic violence would be not entertaining anymore, but nightmare inducing.