Python 3.10 reaches end of life on October 31, 2026 . Node 20 already did, on April 30, 2026 . End of life doesn't break anything. The interpreter keeps running. What stops is security releases: the next CVE in that version never gets a patch, and nothing in your build turns red to tell you. The hard part isn't upgrading. It's knowing where the version is pinned, because it's rarely in one place. Where runtime versions hide File What it looks like Dock...