3 of the top 5 posts of all time on that subreddit as an example are speaking in terms of "915 days caffiene free", "2.5 years caffee free" .. etc. These are the most dramatic and interesting stories shared there but the people there are obviously interested in long term case studies and these stories are popular for a reason. Nobody cares about "2 weeks" there everyone quickly realises this is a long slog to getting back to normal of months and years.