Bad argument.
It would hold water if their solution was proprietary and closed source. But it isn’t, and anyone else, literally anyone, can take Proton and use it in their project for profit.
Even if they closed shop tomorrow, or even just gave up work on Proton itself, we’d all still reap the benefits at no cost to us.
Long time “old-school” kernel maintainers don’t know Rust and don’t want to learn Rust (completely fair and reasonable). But some of them don’t want to work with the Rust guys for lots’o’technical reasons.
It’s by far not an easy situation technically. Like this is a huge challenge.
But some of those old-school C guys are being vocal about their dislike of Rust in the kernel and gatekeeping the process. This came to a head at a recent conference (Linux Plumbers Conference?) and now one of the Rust maintainers has quit.
The big technical challenge is being confounded by professional opinions.