But the source isn't the point, it's the governance. Just like Chrome, having the source is not enough to guarantee an open platform. Sure you can disable telemetry flags. But you cannot afford to maintain an important feature Google wants to remove, like MV2.
https://arstechnica.com/gadgets/2025/03/google-makes-android... https://www.androidauthority.com/android-16-qpr1-source-code...
"Google built Android to be impossible to maintain without them."
Could be a very genuine answer to that question. Do you really need all of Android? What if you can build a very similar thing at a fraction of the size.
But I agree that it is a significant endeavor. But the OSS community succeeded in similar projects before, and the current state of the Linux desktop makes me hopeful.
That depends on who "you" is. Maintaining extensive patch sets is still way cheaper than building and maintaining an entire browser.