I drank tea (all sorts: japanese/chinese greens, oolongs, pu-erh etc.) for the past 10 years. Considering the amounts I drank, I assume the caffeine content wa

I drank tea (all sorts: japanese/chinese greens, oolongs, pu-erh etc.) for the past 10 years. Considering the amounts I drank, I assume the caffeine content was not much different to the one of an average coffee person. On 1st September 2020 I stopped entirely. The only issue I still face is that my focus is not where it should be. I hope that still changes but it may also be related to the fact that I haven't socialized for almost a year.