It's telling that both people recommending this method have seen it fail multiple times, and are somehow rebranding those failures as successes. Every time you quit again "successfully" was because the previous attempt failed.
While I'm not aware of efficacy studies of different methods of quitting caffeine, cold turkey seems most effective for nicotine and a few other stimulants.
The irony isn't lost on me, but we're recommending a method to safely wean off the substance to prevent having withdrawal symptoms, which have prevented me from coming off from caffeine in the past.
I wouldn't frame starting up again as a failure. Quitting short vs. long term are two different things.
Just be careful not to double dose when taking the pills.