I mean, two whole generations are growing up without using regular computers until they enter the workforce or go to college. When I was in highschool, I was told that the generations after me would mostly be more technologically literate than anyone was at the time, but with smartphones and ChromeOS it seems that the time to learn how to use a personal computer now begins far later than it was for us millennials.
There are so many basic things about using a computer that it is no longer to expect a high school graduate to know, such as how to use a printer (or what a printer even is), how to reboot a computer, what a browser is, etc.