Rust usage at these companies isn't yet 'large' in the sense of KLoC or anything, especially compared to existing legacy codebases, but it's getting put in at some really critical infrastructure levels that are unlikely to do anything but grow imo.
That's kind of the thing about rust though. That's where it's got the most power to improve things, so its introduction to a workspace is kind of subtle.
Is there any public source for Apple using Rust?
And yeah those are exactly the domains Rust is designed for, and even if it doesn't mean huge codebases, that kind of usage at a whole bunch of huge companies hopefully means Rust is more likely to survive beyond the initial hype. :)
I would characterize the amount of Rust being done at Google as ... insignifant.
That could change, but apart from Fuchsia and maybe some kernel driver work I struggle to picture where it would fit in the language pantheon there.
I am in contact with some people in the Android team at Google that are also using Rust (and that want to use Miri :D ).
But I'm sure it's growing. But it won't be in the core Google3-on-Borg parts of Google, which are on the whole in either C++ or (increasingly) Go. Switching to a standardized garbage collected Google supported language makes sense in that domain. The "Carbon" stuff recently announced sounds interesting as well.
The long term looks good for Rust. But actual production code is still thin on the ground still everywhere.
