That's a workaround, and a US-only one so, for those who are very, very eager to run Office.

It's not a natural first option for writing documents if you're on a device which already has Google Docs, Polaris Office, Kingsoft Office or anything like that.

In fact, most people will probably never even consider it an option. At least not until Microsoft provides a native version of Office for their preferred procrastination platform.

And kids growing up these days spend more (most?) of their time on mobile devices, running iOS or Android, or when on a laptop, 99% of the time in a browser.

The time when people grew up and learnt Microsoft by default is definitely over. These days you can actually grow up, learn computers and internet without ever once using Microsoft software. It's not that far fetched.

This is Microsoft's problem. They can no longer claim to be the one default everyone knows, uses and are familiar with (and hence prefer).