You kid, but that was literally something I told myself to justify learning Japanese: "It'll help me learn Chinese... later on."

Turns out that having reasons for learning languages is overrated, anyways. I still have "justifications" for learning languages but over time you just grow fond of the languages themselves to the point where learning feels self-sustaining. I think I have a decent theoretical knowledge of Chinese by this point but just haven't built up enough momentum to say I'm actually learning it yet, and who knows when that will be.