Feels a bit like the "new more efficient battery technology" recurring post.
edit: to precise it's not that I'm not supportive of the effort, just that it would be nice to just have a post when it's actually merged. The title is a bit deceptive
The Linux kernel has become one of the most, if not the most important piece of IT infrastructure. Progress of any further developments of it as well as the security itself are prime concerns for all users. So far the development was solely limited to C, with all the tradeoffs. It is highly interesting to see whether a more modern language can be incorporated and the Rust effort looks very promising. Both from the language capabilities as well as the progress being made.
Ada, C++, Java, Objective-C, Swift and yes Rust.