Background: I taught high school science for half a decade and now I am in tech.
This will never take off. One, there is no money in Ed.Tech. There is no money in Ed.Tech. There is no money in Ed.Tech. What little money there is goes to the obvious stuff like student records databases. Anything that requires an ongoing subscription fee is dead in the water. The only reason those stupid smartboards took off is because they make school boards look cool, they are a one time cost, and can be paid for with bonds (because they are a one time cost). Teachers don't want them (projectors and document cameras are good, though). Ed.Tech is a wasteland of failed startups. Part of the problem is also that classic "the people with the purchasing power are not the people who will be using the product" problem.
Two, everyone outside of education thinks "well has anyone just tried sitting down with the kids and talking to them/explaining it to them?" Yes, obviously. The problem isn't that they are lazy, snot-nosed kids (that's a problem well within an experienced teacher's skill set to solve). The problem is what is the AI going to do with the kid says "fuck you" to the AI because they haven't eaten since lunch the previous day (school is the only place they get regular meals), or they don't even know what to ask because they are basically 4 grades behind in math, or the wifi is dead for the 8th time that month because the school board will never pay for infrastructure.
Three, what if the AI is just wrong and starts confusing the student? Even GPT-4 fabricates things all the time. Sure it can generally put words in grammatically correct order and is passible for writing no one is going to read anyway (like marketing emails). But the moment it requires actual domain knowledge all these AI models completely fall down because, again, they don't actually understand anything, they just are really good at guessing what word comes next.