Well, I'm not opposed to it, as much as I have yet to "see the light". I think that the the original non-trivial problem of deciding which thread or which subroutine gets to change what piece of memory at what time is still there. The original problem was a logic bug, but it manifests as a memory bug in C.

As an aside, I've recently been working with PLCs and I've come to respect a lot of the design elements of things like the Siemens GRAPH language which makes it easy to capture my intent for sequential control stuff.