The recent XKCD has brought Primer back to the collective foreground.
I've seen many MANY people explaining the timeline in Primer, and with the exception of the 'birds nesting in the attic' (which I didn't catch when I watched it, because it was too far away from the Big-Reveal), they don't seem to add much to the conversation. The timeline didn't really seem complicated enough to need an explanation; it is internally consistent. The Big-Reveal follows the movie's logic. So, what's to explain, right?
So, is this an Internet joke? Like the 3-wolf-moon t-shirt reviews? It didn't occur to me until today, but is everyone just playing and I didn't get it? Like, if we all pretend that Primer is really complicated and unknowable, that makes it funnier? I kind-of get that.