I started seeing the association between caffeine, jitters and anxiety now that I am in my early thirties. Like you, I enjoyed many years of symptom free caffeine "indulgence". I've switched to enjoying decaf brewed at home with beans that have been decaffeinated using the Swiss Water Method, which removes 99.9% of the caffeine by soaking the green coffee beans in an extract of green coffee + water minus the caffeine - the caffeine diffuses out without the use of solvents! I do agree that most decaf tends to not taste the same at most cafes, because decaf beans tend to sit around longer that regular beans.. sometimes even pre-ground (the horror). I've fell in love in coffee again, and I'm looking into getting a Kafatek Monolith and a linea mini for the home, but if you are getting rid of any espresso equipment at fire sale prices, let me know ;)