I've tried it when singlehanding but so far I'm not convinced.
1) Trip hazard in the cockpit, right in front of the companionway? When singlehanding? Seriously?
2) I don't like sitting in one place for more than a couple of minutes at a time. Crossing the boat to trim the jib
is a good excuse to move around and point my head the other direction. I need to peek under the jib
to look for traffic more often than I need to trim the jib
3) I think on dinghies
you really don't want to move around if you don't have to, because you are the ballast. But on bigger boats, moving around isn't as much of a big deal.