[adwn]

This one?

> Turns out threads also may share resources like out-of-process files, memory mapped regions, shared memory, databases, distributed transactions

For multi-threaded parallelization,

    - out-of-process files
    - databases
    - distributed transactions

aren't really relevant, and Rust directly helps with the other two aspects:

    - memory mapped regions
    - shared memory

In practice, your "very specific" aspect is the most important one, and the hardest to get right without Rust's Send and Sync traits and their automatic enforcement.

[pjmlp]

Who gets to say what is relevant is the architect driving the project implementation.

> aren't really relevant, and Rust directly helps with the other two aspects:

Not at all, because Rust code has nothing to say about what other processes do to those resources, the only thing you can do is wrap accesses in a unsafe code block and hope for the best, that nothing was corrupted.

[adwn]

I think you're confusing concurrency with parallelism. I've been talking about parallelization since my first comment in this thread. There's some overlap, yes, but the aspects you listed have typically very little to do with parallelization, which is why I called them "[not] really relevant". And where they do matter to multi-threading (the shared memory part), Rust does help with correctness.