The withdrawals are unpleasant but certainly manageable. A good week and you're effectively detoxxed, two and your brain is reset. Moreover, as long as you refrain from adding sugar/sweetener to your coffee it's closer to a benign habit than an addiction, as black coffee has little to no downsides if your heart is ok.

This is coming from a pot/day drinker who's 'quit' multiple times. In the end it's not worth it, because coffee also comes with the pleasant social contract with other coffee drinkers as well as a appetite suppressing effect.