I don't think unsafe Rust has gotten any easier to write, but I'd also be surprised if there was much unsafe except in the low-level stuff (hard to write Vec without unsafe), and to interface with C which is actually not hard to write.

Mostly Rust has been used for drivers so far. Here's the first Rust driver I found:

https://github.com/torvalds/linux/blob/2137cb863b80187103151...

It has one trivial use of `unsafe` - to support Send & Sync for a type - and that is apparently temporary. Everything else uses safe APIs.

Drivers are interesting from a safety perspective, because on systems without an IOMMU sending the wrong command to devices can potentially overwrite most of RAM. For example, if the safe wrappers let you write arbitrary data to a PCIe network card’s registers you could retarget a receive queue to the middle of a kernel memory page.