Skill Decay Rate
About 2 months ago I completed the French skill tree, and for all this time I've only been logging into Duolingo to keep the tree golden. On average I only have to do 1 or 2 skills per day, but will I ever reach a point when the skill tree stays completely golden for weeks? I want to learn a few new languages, but if I do too many then I'll be stuck keeping the trees golden for 2 or 3, instead of learning ones that I'm really interested in. Japanese is my priority, but in the meantime I want to learn German, and I worry that when Japanese comes around I won't actually have time for it, since I'm keeping my French and German skill trees golden. Obviously, I understand the skill trees decay rate corresponds to the human brain's decay rate, so I'm asking, is there a point in language learning where daily practice is no longer required, or more appropriately, can this point be achieved with Duolingo?
For weeks? Probably not.
Just don't worry about keeping you tree golden. It's just DL best guess on how well you know a language, and if you think you are ready to move on, move on. Don't let keeping the tree golden keep you back.
(note, at most I think an individual skill can stay golden for two months, but it would take reviewing every skill, every day, perfectly, for a long time to get to this level-something I don't think anyone would suggest)
I think the really basic skills could manage more than two months, I remember I haven't done phrases in a loooong time. The more advanced skills I'm not sure, I guess in theory they could take the same path.
Remember, that you still run into words introduced in the phrases section during regular practice. (words like sí, no, nada, por favor). When you see these words, you are strengthening phrases. If you stopped DL completely, after about two months all of your skills will decay.