(I'm the author, and) Yeah, whatever you might call them, canonical lines are an "obvious" enough idea that I'd expect a lot of shops to have arrived at them independently. Besides yourself, I've heard from a number of people where that's been the case.

That said, it's also a surprisingly non-obvious idea in many respects — a lot of people are used to just traditional trace-style logging and never come up with a construct like them, so we felt they were worth calling out as something that might be worth doing.