It's not what programming languages do, it's what they shepherd you to (2020)
I've become worried about Rust as "async" worms its way into more crates. "Async" is optimized for I/O bound programs. The special case of a large number of slow network connections talking to a server, web services, is what it's really used for. If you have multiple compute-bound tasks crunching away, it's a mismatch.