Just answered another OP on this subreddit, but in short yes. Im typing this from a note 9 2018, not a lag in sight runs 8 hours for the battery. S21ultra from 2021? 888 snapdragon, pretty modern and versatile camera setup not s23 ultra but still very good. Still gorgeous display, will still get updates for a while and will last a very long time. For its price now highly recommend!
Just answered another OP on this subreddit, but in short yes. Im typing this from a note 9 2018, not a lag in sight runs 8 hours for the battery. S21ultra from 2021? 888 snapdragon, pretty modern and versatile camera setup not s23 ultra but still very good. Still gorgeous display, will still get updates for a while and will last a very long time. For its price now highly recommend!