A bit too high on the "positive caricature scale" to my taste. That said there's a kernel of truth there, focusing on the developer experience will lead to improved impact.

This is a good list of guidelines to produce a service which is less of a pain to test locally, deploy and operate. Of course, don't take everything at face value (not all of it aged well) but it's a good source for inspiration.

Interesting set of metrics indeed. As usual the danger lies in how/if you set targets and potentially fuzzy definitions of some of the terms.

Obviously didn't read it all but this is a very large knowledge repository of practices from many companies one can get inspired by to work on Site Reliability Engineering. It is especially comprehensive since it's not only about technical tips but also deals with hiring, team building and culture (which is almost as important if not more).