[gadflyinyoureye]

Tech changed. Most of the google suite exists within the browser. While the teachers had to learn new tools, they didn’t have to learn a new OS. Even if the OS learning was trivial, it could still make for a hard transition. It was foreign. It was scary.

Google is Google. They’ve been using it for years. They’re ok with the browser. Less emotional load.

[digisign]

I think you're on to something. Though using a browser on any OS has been pretty similar for a few decades, the "scary" thing must be a larger factor than I've considered before.