I've got some Workstinx set up with Volie releaseabe bindings for powder and also some Super Stinx with the same release system, except they have adapter plates and I have G3s mounted on them. I would not ski with anything else. When you are in bumps or funky snow it is psychologically a lot easier to put that leg out in front at an angle when you know your bindings will protect you. I think it allows me to charge a little harder, which is ususally just what is needed in heavier snow. I weigh 215 lbs., have them set on the max (5), and they very rarely prerelease. I have always come out when I wanted.
On the Bozo front, I caught a tip getting on the chair this year with my Superstinx and my ski came off with no impact to my leg. Without releaseable bindings I would have probably ripped up my knee, been jacked off the chair onto my face, or both.
In the backcounty they also come in handy if you crash in a weird position (i.e. tree well or deep snow) because you can easily get out of your skis if needed.