@phil ooh good luck

(Do you want unsolicited advice? I did this successfully and painlessly with coffee last year.)

@dantasse me too, but then I went back

And happy for tips! But I have to point out that any advice you give is not unsolicited

@phil hahah well now it's not, true

what worked for me: combine in the decaf version a little bit more every day. So with coffee I did 20g coffee, then 19g coffee + 1g decaf, then 18/2, etc. With soda I guess you'd have to open a coke and a caffeine free coke and mix in like 5% cf + 95% caffeinated, etc; it's a little inefficient (wasted soda) but I had "the same drink" every day, never felt like I was missing out and my tolerance just went to 0