>> so writing an incremental parser in the form of a Tree-sitter grammar is much simpler than modifying a language's compiler toolchain in order to make it incr

>> so writing an incremental parser in the form of a Tree-sitter grammar is much simpler than modifying a language's compiler toolchain in order to make it incremental To be fair, incremental compilation is way simpler than making the support of incremental X where X is part of the toolchain. Also, although the Tree-sitter approach taken by the Rust plugin for IntelliJ seems like "the right way forward", I think in the long run having the compiler do that for you is a way-way easier-to-manage approach.