Local schools are leaning heavily on chromebooks. They have checked them out to students without computers. Adding an os update to this would contribute to the chaos.
Except when they move the launch bar from here to there or hide scrollbars or make any of a million other changes that cause your screen to no longer resemble the screenshot you're trying to learn from.
I updated a couple weeks ago and every tab was discarded when I tabbed away, reloaded when I tabbed back. It's better now. I can only imagine the problems that would cause for a school with a couple hundred of these checked out.
install session buddy from the chrome web store. it saves your tabs automatically, & even restores sessions containing a mix of tabs & web "apps" accordingly.
Provided they go right. If the entire team is adapting to a new way of working it makes sense to hold off on new releases while you make sure you've got everything working right.
IIRC my school district (in WA state) pinned Chrome OS versions for a long time because the state standardized testing software required a specific Chrome version. Not sure off hand if that's still a problem.