Sabine Hossenfelder on Quantum Chaos

This is all new to me, ... but I do remember being mystified by Joseph Ford's chapter 12, somewhat pretentiously entitled "What is chaos, that we should be mindful of it, ..." In Paul Davies' book The New Physics (1992).

See Decoherence, einselection, and the quantum origins of the classical Wojciech H. Zurek (May 24, 2001) and Michael Berry's explanation: https://michaelberryphysics.files.wordpress.com/2013/07/berry337.pdf. Also Sean Carroll's blog post Quantum Hyperion.

I don't understand what she means by this averaging process either.

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