How old is too old?

@nonoise and @billpete 

If you're looking to reduce your caffeine intake, consider experimenting with teas.  In approximate order from most to least caffeine/drink:

expresso
coffee
mate and tereré
black tea
green tea
white tea

The first 2 of these get their caffeine from coffee beans; the last 3 from tea plant leaves.  Mate and tereré are produced from yerba mate leaves.  It's a good time of our life for less ambitious explorations.  You might try a variety of these beverages for both flavor & kick.  The further down the list you go, the more you can drink!

@noromance 

Personally, I'm not much of a caffeine imbiber, but have had many friends into food & drink.  I've consumed everything listed above over the years; these days drink them rarely, and usually at the green tea level.  I've got a hankering to explore the whites, though...  (Living in the birthtown of Lagunitas means I have lots of connections to music & drink through beer).