I used to drink about 8 cups coffee / day. I went cold turkey, it was horrible for about 2 weeks. Marching up and down the bedroom house at 3am, like a proper addict. Scary.

But I don't drink any tea or coffee now.

Since giving it up, I've drank tea coffee again occasionally (twice last year). I enjoyed it, but I didn't feel the need to keep drinking it, and stayed "water total".

Personally better mood now without caffeine (no extreme ups and downs) and general health too (once you get over the line).

Hang in there, it's worth it.