But why bother- using a meter doesn't take much, if any more time than assessing all the factors to use Sunny 16 optimally and measurement is going to be more accurate than a guided guess whenever exposure is in doubt or critical . In any case I don't think you can expose transparencies well consistently by making a single assessment, no matter how derived- whether a meter reading or a guided guess.
"Make (extensive) notes for each exposure and analyse each print, negative or chrome"
This just isn't what I want to do when I'm photographing. I want to concentrate on composition, decide where I'm going to move next; judge how I want my photographs to look; assess whether this shot is going to improve if I wait, and so on - not write stuff down for close examination later on every shot. I can do this only if I have a process for assessing exposure that works materially all the time. Sunny 16 wouldn't do it for me.