There every complex enough distributed system will eventually implement Erlang but in an ad-hoc and not very good way. Quite a lot of systems ended up with actors. TigerBeetle in Zig, FoundationDB in C++. But they miss critical aspect of it and that’s isolated memory between processors. And they don’t know how to yield unless they do it on IO or do cooperative yielding. The global shared heap is really the dangerous part though. Rust could avoid the danger by asserting some guarantees at compile time.
I can't imagine those examples you picked implemented in Erlang performing anywhere close to the Zig/C++ ones. So the "ad-hoc subset" there is by design.
