I gave up caffeine from New Year, having been a 12+ cups of proper coffee a day man (that’s software engineering for you).
Having lived in Durban for a stint, I’ve acquired the rooibos taste so I now have that instead of coffee. The green rooibos is particularly easy to drink gallons of on a daily basis. I would say that the vanilla is a bit sweet after more than 2 enormous mugs.
Decaf tea and coffee is a bit ‘meh’ to me. Not a bad substitute but they make me feel like a vegetarian eating meat-free sausages.
Strangely, after years of caffeine abuse I found abstinence had absolutely no effect on my sleep, concentration nor mood.
My wife may disagree with the latter.