>The sad truth is that the path of an architect or principal / staff engineer is closed for a pure android developer. The pure android dev simply won’t have the required skills to fulfill those positions.

Is this true?

Not at all, I work at a well-known company that has Staff and Principal Engineers for iOS and Android as well as backend.

and what will those Staff / Principal Android Engineers do if they quit?

Boeing has a similar aircraft as well: https://en.wikipedia.org/wiki/Boeing_Dreamlifter

Not quite as bulbous, though.

And then of course there's the Super Guppy, which I'm pretty sure is how the Cylons came down to earth undetected...

https://en.m.wikipedia.org/wiki/Aero_Spacelines_Super_Guppy

This boeing is chonk!