[kstenerud]

With a standard library and API that everyone adheres to, you just pass in some initial configuration during app initialization to decide which libraries record what kinds of information. The user only touches one file to enable and choose instrumentation.

With hooks, you get nothing unless you hook, which means you have to write hooks for everything you're interested in (and also come up with a way to export the data), and so the user must touch code all over the place.