The thought occurred to me this last week that the explicit notice in 3D printer handbooks against leaving them unattended has quietly disappeared. Chalk it up to manufacturers' confidence in the failsafes and design of their machines in 2026 perhaps. Of the modern printer handbooks that I scrubbed through to check my thinking for this poll, I could find only Prusa persisting with such a note.

Prints can easily run into the tens of hours or longer – meaning we’re all forced to draw our own line on risk. Where does your comfort level actually sit?