An additional flaw with Duolingo's streak process (but I'm sure common since they've at least thought about skip-one-day) not mentioned in the article is that t

An additional flaw with Duolingo's streak process (but I'm sure common since they've at least thought about skip-one-day) not mentioned in the article is that there's no way to preserve even part of a streak if you miss a week, even if you know in advance and it's either necessary (business trip) or part of the process (camping out of internet coverage - yep, still a thing). There's also no way to ask them for this (no "feedback/feature requests" area). This happened to me recently, and I was a few days late getting back on the wagon since I knew that my months old streak was just as dead either way. What would help is some kind of 'streak hibernate', with whatever trickery is needed to make it something you don't just leave on all the time (perhaps: you lose a day for every inactive day plus an additional day on the invocation). Or, just don't care much about the streak at all (which would seem to diminish the motivational value).