It is my understanding that decaf coffee is typically made from poor quality beans, because consumers typically expect decaf to cost as much as regular coffee even though the decaffeination process means an additional cost.

For decades I only drank decaf and only in the past few years I have replaced my morning cup with regular coffee because it's so much easier (and cheaper!) to find good beans.

In other words, there are good reasons to consume caffeinated coffee besides an addiction to caffeine.

Many people enjoy both the effects and the taste/experience of drinking coffee.

I make coffee at home and I always have decaf beans on hand. Sometimes I just want to:

a) Go through a process of making espresso (yay coffee toys^Wtools)

b) Just want to drink some coffee because of its taste

I eye-ball how much caffeine I consume and cut-off myself waaaay before the guideline and 10 hours before target bedtime. Given that caffeine half life is about 5 hours it works out perfectly. However, if still want coffee due to any of the reasons above - I make decaff.

Yes, sometimes.