It was years before we had rust-analyzer.

A year and a half doesn't seem like bad turnaround time to me. shrug

    On June 27, 2016, Microsoft announced a collaboration with Red Hat and Codenvy to standardize [Language Server Protocol]'s specification

— https://en.wikipedia.org/wiki/Language_Server_Protocol

vs

    initial
    Date:   2017-12-21 22:25:45 +0300

— https://github.com/rust-lang/rust-analyzer/commit/a63222cd24...

I've been using rust since 2010