Similarly, isn't this the insight that led to both ChromeOS and FirefoxOS?

How many actual regular every day people are using either? ChromeOS's big market is "tired and underfunded K-12 IT/Library/HVAC admin who just doesn't give a fuck give the kids a chromebook so I can go do something else", it's not exactly making waves among the general populace.

In my experience, very few. FirefoxOS failed hard, and anyone who uses ChromeOS quickly becomes acquainted with the limitations of the approach.

I mainly brought them up in a "we've tried this before" sense.