I once left a torrent on for ~three years at 50%, obviously no one seeded that anymore. one day i realised it was completed, and i have no idea when. now i only streamed my high sea amusements, i don’t even have a torrent client on anymore, but i like to think that the three copies seeded from mine (based on uploaded data) is still out there somewhere.
3D printing is just a tooI? blacksmithing? 3D print a ‘lost-wax’ plastic mould. Gardening? making some custom very specific mounts or drip ends.
You don’t put on a hobby list ‘wielding a brush’. It’s what you do with it;