Most of the students using chromebooks at university or school do not have own computers at home. These devices are all they've got to access the internet.
Every experience they'll make during their teenage years with computers is shaped by these managed experiences.
Just because it's legacy, doesn't mean it's not a powerful tool.
Files have multiple advantages over other approaches, such as being independent from the application that created them (even if the company subsequently goes under), being editable with a different application from the one that created them (though imperfectly sometimes), and being self-contained bundles of data that need no infrastructure to support them other than a local application (compared to other approaches, where a large cloud infrastructure is basically mandatory and you're SOL if it goes away for you).
Recency bias is a thing. Try to work counter to it.
Every experience they'll make during their teenage years with computers is shaped by these managed experiences.