Recently tested Tsinghua University's open-source AI private tutor class OpenMAIC, and it is indeed very powerful.

Ask a question, or toss a PDF to it, and it can quickly create a lesson based on the query, also allowing you to set characters for classroom interaction and discussion.
It can even automatically extract charts from PDFs for coordinated explanation.
But there are still some limitations; it's not as all-encompassing as rumored.
For example, in learning minor languages, while it has the basic ability to organize knowledge points,
currently it cannot achieve the smooth language switching and immersive scenario simulation like English, and knowledge expansion isn't as flexible.
Probably not just for minor languages—once AI moves away from high-resource, strongly structured, and standard-answer areas, its capabilities will noticeably decline.
Aesthetics, judgment, on-the-spot adaptability, handling various unexpected situations, and how to properly use these tools—perhaps these are precisely the areas where humans are most difficult to replace.