I switched to vaping, then gradually lowered the nicotine levels in my juice over time until I was vaping 0 nic for two months. Then I realized I no longer needed it, and stopped vaping altogether, quitting nicotine for good. This was back when you could get high quality juice sent to you in the mail, though, which is no longer possible, IIRC.
Obligatory TBD Liquids and Blue Dot Vapors, absolute GOAT.
bigfax yo