You only have so many things you can do at once.

From our perspective dev container seemed to be what our target audience was already using; as its supported by VS code natively and also as almost all OSS projects are hosted on Github, and their product Codespaces support it as well - it seemed like the logical first standard.

But as mentioned devfile, nix and flox are on the roadmap.

Dev containers provide a robust standard that is seamlessly integrated into VS Code, which makes workflow smooth end-to-end. Thanks to the Daytona plugin architecture and Apache license, it is relatively easy to bring in more standards. Cause, you know: https://xkcd.com/927/