I also don't find that caffeine wakes me up or keeps me alert. I used to have it a ton because I like the taste but then mostly stopped because I was having some anxiety issues and wanted to be sure caffeine wasn't a factor. Stopping it was zero problem at all for me, which doesn't align with what others say about stopping consumption. I don't know if my body's metabolism of it is super fast or if my brain is weird in some undiagnosed way that prevents the caffeine from working "correctly"