Earlier quoted context omitted.
Also, perhaps even more importantly, you'd be starting from scratch in terms of app ecosystem, which is even more important today (and especially on mobile) than it used to be in the PC era. You could get some mileage out of the web- but first you'd have to build or port a browser. Chromium certainly won't target your open OS, and with its 75% market share, it now strongarms the direction that web standards take. And…
> Also, perhaps even more importantly, you'd be starting from scratch in terms of app ecosystem The "app ecosystem" on a free mobile OS would be shared with the "ecosystem" of free PC apps. Chromium does target, e.g. Debian GNU/Linux, as do quite a few proprietary apps relying on Flatpack. There's no reason why we shouldn't be able to piggiback on this work for the mobile platform. Yes, UI is different, but not that…
That said, because of the way Google APIs have extended their tentacles into non-Google Android apps, many of them cease to function without Google Services installed. So you'd still have most of the app ecosystem problem.