[xelamonster]

This sounds better if you never use cloud editor platforms; devcontainer can be useful if you jump between local coding and say GitHub Codespaces where devcontainer.json is automatically recognized.

IME a hybrid of your approach and devcontainers works best in that situation though, because I don't want to rely on or even figure out how to use the devcontainer recipes, and building them every time the thing spins up takes forever. I like a workspace container defined in a Dockerfile that publishes to a registry and a very basic devcontainer config to use it.