It was a neat idea but they didn't take it far enough. It would have been neat if you could restrict dependencies from network/FS access, but they didn't make it that granular.
I was a fan of Deno from the beginning, but not targeting NodeJS compatibility at the beginning turned out to be the wrong move. Now Bun gets to be Anthropic's testbed for the future of software development. (Which includes the wholesale plagiarism and optimization of Oxc into its codebase, wowza.)
Side note: `deno fmt` is a great Markdown formatter. I might get around to extracting out just that part of it.