Even if I am only slightly more productive, it feels like I am flying. The mental toll is severely reduced and the feel good factor of getting stuff done easily (rather than as a slog) is immense. That's got to be worth something in terms of the mental wellbeing of our profession.

FWIW I generally treat the AI as a pair programmer. It does most of the typing and I ask it why it did this? Is that the most idiomatic way of doing it? That seems hacky. Did you consider edge case foo? Oh wait let's call it a BarWidget not a FooWidget - rename everything in all other code/tests/make/doc files Etc etc.

I save a lot of time typing boilerplate, and I find myself more willing (and a lot less grumpy!!!) to bin a load of things I've been working on but then realise is the wrong approach or if the requirements change (in the past I might try to modify something I'd been working on for a week rather than start from scratch again, with AI there is zero activation energy to start again the right way). Thats super valuable in my mind.