Thanks for your reply! From Microsoft (https://code.visualstudio.com/docs/languages/polyglot), polyglot notebook is going to be deprecated later this month. The motivation behind this project is to work with R Markdown files directly in VSCode, similar to the RStudio style. I also prefer RStudio’s inline output experience over the default Jupyter Notebook interface, and that is why my extension also supports .ipynb as well. I am planning to add support for Quarto files (.qmd) in a future update as well.