Yes, I know the four main methods of decaffeination. The haters have gone down this road with me many times. Why can't people just let me drink my decaf? It's like they can't enjoy their caffeine unless everybody does. It's weirdly pushy.

I don't think GP was criticizing you for liking decaf. Just pointing out that the decaf process may have affects on the beneficial compounds that aren't caffeine.

My initial charitable reading -- as someone who sometimes dabbles in decaf -- is that decaffeination has the bad side effect of stripping flavors, and likely many of the other biologically active chemicals. I can see from their further posts that they were more interested in unscientific fear mongering instead.

That said, I do think there is some truth that decaf is lacking (including via supercritical CO2) and I wonder how long until we could have a product like genetically engineered coffee plants that produce everything except caffeine. I'd like that, though I can immediately see an issue with growing a plant without its natural pesticide.

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By "All you haters that give me grief for drinking my daily cup of decaf can shut up now", you are implying that decaf has the same health benefits of real coffee. That's not proven. And if you weren't meaning to imply that, there was no point to that reply.