Isn't Windows 10 free anyway? Or is it just the upgrade?

When I was a kid, I read some books from a then popular Soviet Sci-Fi series. In one book, the main protagonist travelled 100 years into the future. It was a utopian, Communist future where money was abolished, everything was free and people worked because they enjoyed it.

Our protagonist came across some strange machines in the street of the future city that turned out to be ice cream vending machines. Of course free. She tried an ice cream and liked it. She tried another flavour, then another... And after three, the machine refused to give her another one because it was not healthy. And of course, all machines were linked so that was it with ice cream for the day.

It was meant to be a good thing. Machines looking after you etc. But I remember thinking, as a 12 or 13 kid, how horrible. A machine deciding what is good for me, how lucky I am to not have been born 100 years later. Turns out I was too hasty.