[Derekasaurus]

I only recently discovered that OmniFocus for iPhone supports sequential and parallel nested tasks. This is academically interesting but I haven't really found a use for nested tasks. That is, my projects consist of a list of tasks 1...N, but I've never really had the need to subdivide a task within a project into smaller (sequential or parallel) tasks. I've tried, but I find that so much nesting leads to complexity without really solving any problems, so I tend to flatten projects into simple lists.

Of course I realize that my lack of need for nested tasks is likely just a product of the kinds of projects I work on, which (apparently) serialize well without needing the additional level of hierarchy.

However, nesting tasks is a cool feature. Are there any other interesting/useful/unconventional uses for nested tasks other than the obvious?