Is Duolingo's premium push annoying or brilliant, and how might this strategy shape the company's future?Language-learning specialist Duolingo (DUOL 13.81%) loves its premium subscription plans. The premium-plan appreciation is honestly getting a bit too intense for some Duolingo users.Is the company pushing its subscription plans too hard in 2025?What's going on?Duolingo is always tinkering with its user interface. Co-founder and CEO Luis von Ahn wants to build an effective learning platform that works for ...