> I say half problem because in my experience fixing it is also beneficial for "specialists". This is critical. Once I realized that even experts didn't necess

> I say half problem because in my experience fixing it is also beneficial for "specialists". This is critical. Once I realized that even experts didn't necessarily have homogeneous advanced knowledge of the entire language, it became easier to justify to myself spending time on improving the diagnostics of uncommon errors for clarity and learnability. An expert requires less explanation, but they still require one. And I also suspect that spending time on better DX at the right time of the adoption curve has an outsized impact on it. The bad part is that it is a hard, slow, endless and somewhat thankless job (you're going against the grain of the compiler design half the time, adding logic that needs to be maintained, and for every case you handle ten more pop up elsewhere that need to be handled in a different way).