Fixed, thanks.
Currently mainly a matter of available resources, we don't have anything in principle against it and would be happy to contribute when we can (and have historically done so with e.g. financing platform support for Solaris for clang and helped port libdispatch to Solaris once upon a time at previous companies). Currently we're (again...) in a startup phase so a bit more limited visavi resources at this stage. That being said, we've done a little Linux-platform specific work too (added initial io_uring support to SwiftNIO and still working on a follow-up with outbound write support).