I can't find the original link to his proposal, but I did send him a message on reddit asking if still had a link to it. The gist of it was, he felt the first

I can't find the original link to his proposal, but I did send him a message on reddit asking if still had a link to it. The gist of it was, he felt the first attempt to make a Rust LSP (RLS) had the wrong architecture. It was basically running the Rust compiler in check mode and relaying the errors back. In his opinion an IDE needed a different, incremental architecture that stored state. It also needed to be much more tolerant of errors. He had already made a Rust IDE plugin in Java for JetBrain's IntelliJ-Rust plugin, and wanted to make a similar one in Rust. So he started the rust-analyzer project and it succeeded. Last year it became the official LSP of the Rust project. (https://blog.rust-lang.org/2022/02/21/rust-analyzer-joins-rust-org.html https://blog.rust-lang.org/2022/02/21/rust-analyzer-joins-ru...)