Definitely not just grading. Tutoring is explaining and back and forth discussion to impart knowledge, in context and in response to specific difficulties/confusion the student is having.
Most initial work for them would be in familiar, well-controlled environments - replacing humans in existing factories. I think whether they'd be cost effective for that will remain unknown even after a few years in service though.
That doesn't contradict anything I said. Private networks can be huge, e.g. in big companies, and they can still use .internal. .internal serves quite a different purpose to that proposed for .self, so the top level comment I replied to doesn't make much sense.
Site errored out and gave me three different error messages as I reloaded. I guess it's self-hosted on something underpowered, and dynamic where static would do the job?
Everyone knows Oxford, but the are many thousands of universities, most of which are not known to most employers. I am not an employer, but I work in higher education and see transcripts of transferring and exchange students, and many (probably most) come with some kind of guide on how to interpret the grades, because there are a huge variety of ways of assigning them and defining them (e.g. at some universities a D is a fail, and at some a D is a pass - to know which you're looking at, you need a guide!).
I think you misunderstood. The 1963 term is "hacker", and its 1963 meaning is "computer intruder". I.e. the journalists are using the earlier definition and the definition referred to by "Hacker News" came later.