All of those also screw up your sleep something fierce, and so (general you) end up piling hacks on top of hacks to make something kinda sorta work that you understand less than you did the original system.
(Although, PSA, I do understand that the vast majority of people whose sleep is ruined by alcohol or caffeine or both are also too addicted to quit, and this isn't at this point a conscious attempt at "hacking" anything.)
(Although, PSA, I do understand that the vast majority of people whose sleep is ruined by alcohol or caffeine or both are also too addicted to quit, and this isn't at this point a conscious attempt at "hacking" anything.)