Student myself. Yeah I'm sure some of them do, but the point is that people that do want to learn can benefit from the interactive nature of these LLMs. In this way it's an upgrade on receiving 'BBCADDAACB' in a group chat for a multiple choice test like in the old days.
Those can be had for pretty cheap these days, or you can order custom printed parts from some online services. Plus, some libraries have them now, free or cheap to use.
If anything, services like that can be better than mindless scribbling off of someone else's paper as you can ask clarifying questions and have it explain concepts to you with some accuracy.
As most viral illnesses, yes it has generally gotten slightly less lethal. It's not super clear whether this is mostly due to existing resistances built up from past infections/vaccines or due to mutations. That said, it is definitely not a joke and still kills people in vulnerable groups every day, in addition to likely being the cause of permanent organ damage in many infection cases that don't result in death.
In fact, going back to the initial question, these changes over time could make it even more important for sick people to fully isolate, as the infectivity is higher.
That's definitely the case for now yes with the second stage, though even that is set to change with Starship. But I think it's crazy how quickly some people discount the fact that they are able to land an orbital class rocket on its flamey end and launch it again, 16+ times over. Literally no one else has managed to do this, despite decades and billions of dollars of a head start.
The cost estimate is way way higher than reality. They are basing it off of what SpaceX charges for other companies using a brand new rocket, while they are actually providing their own launch at cost and reusing the vehicles many times. In fact, they recently broke their own record and launched as well as landed a rocket for the 16th time. This means that their actual cost is mostly fuel and some refurbishment costs, not the price of a fully new vehicle.
Globalization.