Sounds drastic, right? I've decided that I'm going to take a break from polyphasic sleep - probably 3-4 weeks. As of today I've been doing it for about 4.5 months, and I feel like I have a good feel for what it's like.
The truth is that napping during the day isn't hard to do, but it is definitely disruptive - especially to other people. For example, last week a friend from San Francisco was in town for South by Southwest. I was hanging out with him and his friends, when all of a sudden it was nap time. They basically had to sit around and wait for me to take my nap, or lose my company. If I was deriving great benefit from the schedule, it would be worth such social impositions, but I'm not really getting that much from it.
I don't really need the extra time right now. I thought I would make good use of it, but I honestly don't. If I was super busy, then I would be more motivated to stay on polyphasic sleep. Also, no one else is doing it with me anymore, so my options for what to do during the night are fairly limited. Because I don't really need the sleep, and usually don't have too much to do at night, I end up slightly oversleeping. This means that I probably sleep 4-4.5 hours per day on average.