Anyone had to quit coffee/caffeine?

Have any of you had to quit using coffee or caffeine products due to medication and/or for any other reason?

What was it like? What was the outcome afterwards? Do you think stopping benefited your physical health in any way, and what about your ADHD symptoms?

I've recently stopped using nicotine myself (about 9 wks clean) but still struggling with sleep/high hr. Thinking maybe I need to cut out the coffee too. Just curious what everyone else's experience has been.