Running VSCode remotely introduces many interesting challenges, mostly due to security. (You are letting your users run any arbitrary code on your infrastructure.) However, I guess GitLab already has this sorted out, because of their existing IDE, and they are experts in this area. Also the open source versions of VSCode don't have access to the official VSCode marketplace. (Both VSCodium and coder.com Code Server.)…
The extensions and settings sync are going to be interesting, especially since they were pretty positive about extension support in the post.