The thing I find disappointing about the article is that nothing else seems to have been explored. Now no options might exist, but then again, isn't the point of such a write up to find the ones that.... do...?

A lot of people know that modern macOS is a bit of a let down when it comes to modifying it unless you disable a bunch of security layers. So the information gained is basically 0.

Edit: I should clarify that some of the ways they analyze how services are launched etc. are quite interesting, though I hope my prior thought makes sense to some.