> if rust as a language cannot deal with multiple compilers (ecosystem doesn't allow it as you described by your crates.io) Why would that not be the case? cra

> if rust as a language cannot deal with multiple compilers (ecosystem doesn't allow it as you described by your crates.io) Why would that not be the case? crates.io is just a code repository like any other. You don't need crates.io to write/use Rust code, and crates.io has no specific requirement for a certain compiler. It just so happens that currently only the main implementation of Rust language (rustc) can compile all of crates.io repository, but this could change in the future.