I can speak to this directly: I've customized a few extensions I use with VSCode, (nearly) completely having the AI generate/iterate over my feature request until it works. I don't have the time to learn the details (or different languages) of the various projects, but I get huge benefit from the improvements.

- PRO Deployer

- MS Typescript

- Typescript-Go

- a bespoke internal extension to automate a lot of housekeeping when developing against tickets (git checks, branch creation, stash when switching, automatically connecting and updating ticket system)