Imagine the possibilities of an AI powered instructor in something like virtual reality that can provide personalized education.
Most other AI guided systems (which are basically all offshoots of large language models in some way) are used as tools by people who are already familiar with the subject matter at the AI manipulates, which means that they can essentially fact check it.
Using the AI as a teacher implies that you are a student with virtually little to no understanding of the subject matter, which means you have no way to sanity check if the AI messes up and gives you incorrect information. You could end up with a deeply flawed understanding of the actual domain you wish to become an expert in.
https://pe.gatech.edu/blog/meet-jill-watson-georgia-techs-fi...
IIRC from my EdTech course, work is being done in this area but nothing to my knowledge at the "personalized instructor" level you're asking about here, with being able to explain concepts in simple terms and answer complex questions, but my experience predates GPT3 and the like.
With the right prompts, it's pretty easy to get GPT-3 or its open source clones to explain complex jargon in layman terms, as seen here: https://twitter.com/jajoosam/status/1545364935395639299?t=FS...
In reality, we're nowhere near there.