One for the photographers amongst you

Ansel Adams was famous for his photography, and to me, especially working out the brightness of the moon for his Moonrise Over Hernandez shot. But flash??? No, Ansel Adams was not a big user, and I'd not recommend him at all for learning about flash.

I manually work out flash-to-ambient coefficient, but I'm a real relic.

So you actually bother with a light meter?
I've never owned a light meter, used one once, decided I didn't need it, and around 95% of my shots are heavily lit mostly with 2-4 flashes.
Only ever worth a damn when you wanna shoot film IMO.