As long as it took me to really comprehend the rate of change thing and understand how calculus is that, until I read that sentence I didn’t think of all the gravity parts impacting a stellar body and velocity in a direction being impacted by multiple forces. Mean I always knew the story of Newton inventing calculus for that but never clicked exactly how it related. The sad thing is it’s a sort of thing I pondered a bit on but never quite made the connection.
Being able to save the state when you have something come up doesn’t make a game a game though. I can see not allowing save scumming (don’t care for that term but not the point) but you should be able to leave a game at your leisure and be able to return to it without having to have the system turned on and ready to play. People can’t always tell how long or much progress a game requires you to be at it before you have to do a large chunk over again because of other responsibilities.
I do see cutscenes being more difficult to handle this but if they’re putting in unskipable cutscenes then that’s something they should figure out, or allow you to skip if needed.