- "So some stuff blocks afterSave, and some stuff doesn't. Does saving another object from afterSave block a save? What about the nested triggers on that other object? Why isn't that documented anywhere?"

This has long been documented here: https://parse.com/docs/js/guide#cloud-code-resource-limits

- "I've never seen a reference to this, despite repeated Googling." ... "Instead we Google for "parse set pointer" and this page comes up:"

It sounds like you're leaning a lot on Google searches bringing up two year old questions. There's a massive archive of questions from the last 3 years, around 10,000 on my last count. Going back through every single comment and answer to make sure they're still accurate would be a huge undertaking, and a year ago we stopped using those archived questions.

I highly recommend reading through the entire documentation for the platform you're working on, as well as the API Reference for your SDK. You can find both at https://parse.com/docs. I think now is a good time to point out we're also accepting pull requests against our Docs[1]. We welcome diffs that make the docs clearer for everyone.

[1]: https://github.com/ParsePlatform/Docs