I've gone off coffee for months multiple times. I went through a tea phase a year ago, there are summer months where I'll drink almost no coffee at all.

I didn't experience any withdrawal symptoms, ever.

And drinking coffee again after that still does nothing for me.

I even bought caffeine pills to see if I could actually get any of the benefits if I stacked these with my high coffee consumption. I think I got up to taking 5-6 200mg pills on top of drinking all the coffee I usually do, didn't notice anything and chickened out of taking any more.

I'm with you. I like the taste of bitter coffee, so unlikely to stop anytime. But I have never felt more energy from it. Drives me wife crazy, as I can have a full cup before bed rather easily. Indeed, I almost feel like it helps me get to sleep easier. (Which sabotages if I try and drink some to wake up and focus, as it is way more likely to make me need a nap.)