Talking with the matrices, you sometimes get made up nonsense or overly verbose trite answers, but I think it's really valuable having a conversation partner with infinite patience for explaining things, and an almost accurate memory of just about anything you might find on en.wikipedia.org
You do have to be careful and to spot check any fact with other sources, but where I find it's great is helping understand complicated or abstract concepts. Having an actual conversation can be so much more efficient that banging your head against the dry definition until it starts to make sense. Anyone who's tried reading math articles on Wikipedia as a layperson and ended 15 tabs deep into very abstract foundational definitions (like "closed" and "open" sets, along with the eternal gift upon the world that is the world "clopen".)
So having a large pile of numbers standing by can genuinely make learning math a lot more fun, and it's one of the few topics where there is a provable right and wrong, so you'll notice pretty quickly if you're being fed contradictory nonsense