Yeah on top of that I've seen virtually no evidence that Rust projects really decay. I bet you can compile some really old Rust projects with the latest Rust with no problems.

In my experience the "oh god I have to compile a 10 year old program" dread hierarchy (from least to most dread) is:

1. Go. Very reliable.

2. Rust. Also very reliable.

3. C++. Sometimes stuff breaks, e.g. when they change the default C/C++ version and dependencies don't specify it. That happened to me recently.

4. Python. They deprecate stuff all the time that is often actually used (e.g. a load of stuff in pkgutil recently).

5. JavaScript. Good fucking luck.