I’ve been fascinated with alternative sleep schedules since I was very young. My initial interest turned to a fascination when I realized the only positive long-term reports were usually from people trying to sell something: Their book, a sleep plan, or just using their sleep cycle as a social hook to impress others (influencers, basically). All of the forum reports started out optimistic and then ended in disappoint…
I did one of the more extreme sleep schedules for a little over a year. Generally I was happy I did it, and there are tons of times that I wish I could again, but external pressure prevent me from doing it again.
I always try to dissuade people from it. It's difficult to get into, and difficult to maintain. It plays hell with a social schedule where people expect you to be awake at certain times.