[n8henrie]

What are you referring to as "sleep hygiene"?

It seems like that phrase usually refers to the things the author mentions as being "necessary but insufficient," not to the CBT-I components that they had newly discovered (which I sometimes summarize as "teach yourself that sleep is not as important as you think it is, and then maybe you'll be able to sleep").

[pedalpete]

Sleep hygiene includes things like not staying in bed if you're not sleeping, keeping a sleep schedule, get out of bed and do something else, etc. These are the things listed as "unintuitive new variants", but they aren't new, or maybe they are new to them.