Unfortunately, I have to say that Duolingo in particular has really annoyed their user base. I won't be surprised if they see a significant drop in users after

Unfortunately, I have to say that Duolingo in particular has really annoyed their user base. I won't be surprised if they see a significant drop in users after this rapid growth. I've used it for a particular goal, but that won't keep me there forever (even on a family plan). Yes, the reddit is full of kvetches, but there are a lot of very valid complaints as Duolingo removes major features (like stories) while people are learning from them or removes lesson choice and suddenly just drops you on "the path". And... there are the bugs. So many bugs. Things just don't work (literally UI buttons just DONT), answers are wrong, you get booted out of the app while running and have to restart. Feel free to file a bug nothing changes. I won't go into the fact that they support a desktop, android, and iPhone other than to say (since I use all of them) that they are all VERY different, and only somewhat linked (as in they can become out of sync). I suspect that's part of both due to their subscriber growth method and technical debt. Probably, they're trying to rationalize things behind the scenes, but as they do everyone who had learned how to use it on each platform suddenly loses things/options/tools they had before to that common denominator. They're not giving you a configurable superset! I get it, it's a hard problem, but don't be surprised when your rapid growth becomes unsustainable.