It’s been a week now since I’ve stopped having “proper” coffee, and to be honest I’m feeling a little more tired than normal during the day (sleep patterns haven’t changed much), but not bad enough to make think it’s having an adverse effect on me..
Psychologically I am drinking decaf for the placebo hot-drink-effect 
Anyways, lets see what happens over the next month or so - am curious to see what happens when I do have a coffee, and what effect that has on my nervous system.
Decaf is not caffeine free. It’s just (much) less. So technically your placebo is a bit more than psychological.
But I’m sure you knew that already. And remember that I’m not a coffee drinker either.
Hi John!!
Umm, I didn’t know that… “Nescafe is decaffeinated with pure water” sounded impressive enough
So, may have to go completely coffee free and stock up on herbal teas then!