And on mailbox you can easily send and receive PGP encrypted mail on mailbox.org. They provide a page for key import, allowing you to send encrypted emails like regular mail when needed.
It’s your choice, if you always want to use proton mail app everywhere you can use proton.
There's not much money in working for a small saas unless you're the founder.
Tiny startups do them now as well.
I hate focusing on the metatools (tools for building tools). It really sounds like the objective here was to build something in Rust. In the article it is even described as "a gpu driver kernel supporting arm mali.." instead of just an arm mali driver
It is a misunderstanding of what the job of writing a driver is, you are connecting some wires between the OS api and the manufacturer api, you are not to build a framework that adds an additional layer of abstraction, sorry to put it so bluntly, but you are not that guy.
Sorry for being rough.