Netbooks were largely a passing fad as were Chromebooks in large part, though the latter are still around to some degree. However, OLPC went beyond cheap laptops and, however well-intentioned, never really took off as a unique entity.
From : https://en.wikipedia.org/wiki/Chromebook#Sales_and_marketing
"In 2020, Chromebooks outsold Apple Macs for the first time by taking market share from laptops running Microsoft Windows. This rise is attributed to the platform's success in the education market.[79][80][81]"
Hmm.
This is interesting. Searches give you different numbers.
But it looks like the number of Chromebooks sold each year is comparable, but probably lower than the number of Macs.
Small laptop computers are ergonomically useful to children who literally have a smaller body frame. I don't think there were many of those around prior to OLPC and/or netbooks, beyond specialty products like the Toshiba Libretto and perhaps the original Psion Netbook. Nowadays we still have low-end smaller ultrabooks that are effectively quite comparable to the former netbooks.
Chromebooks are ubiquitous in U.S. primary and secondary schools