In PMS today, we have the option to keep only the last 1/3/5 episodes total, or only episodes from the past 3/7/30 days. This feature would be much more useful if it were completely open-ended, or if more options were added to this list:
Only keep [qty] [episodes/seasons/days].
Most shows have 10-20 episodes in a season. Keeping only 5 episodes or 30 days’ worth isn’t very useful if you only want to hang onto the latest season.