StringJunky

Yes, most adverse outcomes (such as hypertension) are related to caffeine consumption.

There are are far more studies that indicate that coffee (not caffeine) may have a range of (weak) health benefits.

Would you say that caffeine, when present, negates the small benefits of the other coffee components, so decaff is better if those small benefits were the desired outcome ?

That I don't know. The mechanisms of the health benefits are not really known (and they may be confounding factors). However, a handful of studies suggest that decaff also has benefits, but it is much less studied. If you are sensitive to caffeine it could be better, though. Also detrimental effects of caffeine tend to be only short-term (such as increased blood pressure). So even significant consumption (unless we are talking massive amounts) are likely not detrimental in the long term (...