Biphasic (or any other alternative to monophasic) long term sleepers

[Dimitry]

Morning/Afternoon/Evening from wherever you are,

I'm just wondering if there are any examples of people who have adapted a Biphasic/Polyphasic sleep schedule for long-term without any side effects (as compared to a good healthy monophasic sleep habit though).

What I'm trying to gather is if this is something that you do as bursts for a few months when more time is needed, and then go back to a good monophasic sleep schedule. So sort of an on again-off again pattern. Or are there people who have slept like this for 10 years without any known or seen side effects?

I'm also interested in either well documented experiences of other people, personal experiences or at least of stories where the source isn't separated from you too much (degrees of separation... i.e you know somebody who knows somebody who knows somebody etc.).

With other healthy lifestyles such as diet (vegan etc.), there are plenty of examples of lots of peope doing it for years on end successfully. Whereas with any alternative to sleep, I mostly find it people who are early on into it with the successful results (i.e 6 months to a year lets say). At least that's the trend I saw so far. Anyone else noticing similar results or is my exposure to this just simply limited?

I'm still going to give it a shot myself down the road. I'm currently work on other things and don't want to juggle too many revisions in my life and crash. So I decided to at least do some good quality research before diving in first hand.