My kid has had a public-school-provided Windows laptop since 3rd grade. I don't doubt chromebooks are the majority but I can't find any consistent stats on how wide the margin is.

Even if it had been a chromebook, it's still massively more computer exposure than my generation got. We got to play Oregon Trail on an Apple IIe once a month or whatever until high school, when we might use Wordperfect on occasion.

I would expect that whether a generation becomes computer literate will depend on whether they use computers in work or daily life.

I don't understand, we didn't have computers at all and didn't end up illiterate. Why are you underestimating kids so much?