If curious, past threads:
Tree-sitter: new incremental parsing system for programming tools (2018) [video] - https://news.ycombinator.com/item?id=21675113 - Dec 2019 (28 comments)
Tree-sitter – a new parsing system for programming tools [video] - https://news.ycombinator.com/item?id=18213022 - Oct 2018 (25 comments)
Others?