The end of tasklets

It looks like they're not changing how it runs, just how you write the code and how it's tracked in memory. If anything, context switches have gotten more expensive relative to everything else since 1999, but that doesn't mean that the method for avoiding them can't benefit from more recent API design lessons.

Also, it's now possible to have other user space tasks that are more important and urgent than your web server performance, so it's worth being technically able to preempt it if necessary even if you normally wouldn't.