Also:
> their crypto as well as their app-related code is open, well-documented, and repeatedly audited.
And since nobody builds their executable from source, it doesn't at all guarantee anything about the version I have on my phone right now, unless I do a lot of extra check that virtually no one will do on every update. If whatever entity* aiming for me chose to target a specific update at me on the store that did a clear copy send on the side, I would never know.
* Say, China aiming for a chinese user on whatever chinese app store is popular at the moment, to take the most obvious (but clearly not only) exemple