> Standalone CLI — we haven’t worked on a standalone CLI for the new engine yet, but will absolutely have it before the v4.0 release.
This part is the most exciting to me. Given the rest of the release announcement, I'm assuming this means that it'll be built in Rust rather than embed Node. While I'm not a Rust zealot of anything, I'm very partial to not embedding Node. Particularly when it depends on using Vercel's now-abandoned pkg[1] tool.