Exhausts, erodes, or plateaus

Growth works until some hidden resource, constraint, or counter-force takes over and flattens or reverses it.

Your Spanish climbed fast for six months. Same app, same streak, same 20 minutes a day, and now nothing moves. Or worse, you can feel vocabulary quietly leaking out. The method that produced all your progress has stopped producing any, and doubling the minutes does not help.

A plateau after real growth is the cue that a hidden limit has taken over: a resource running out, a counter-force strengthening, or a saturation point where the old method has extracted everything it can. Run the check in three steps. Ask what the growth was consuming or depending on (easy words, novelty, free attention). Ask what got activated as you grew (harder material, interference between similar words). Then ask whether the ceiling is fixed or created by the loop itself. What changes is your response: instead of pushing harder on the exhausted engine, you go hunting for the binding constraint, which often demands a different intervention entirely, like switching from recognition drills to speaking practice. Don't apply this when progress simply hit a hard one-way ceiling, such as finishing all available material; that is plain depletion, not a dynamic you can rewire.