Why Haven't Any Hobbyists Successfully Built a Metal 3D Printer Yet?

Hey fellow DIY enthusiasts and makers! I've been diving deep into the world of 3D printing as a hobby, and I can't help but wonder why there aren't more hobbyists successfully building their own metal 3D printers. With the incredible advancements in 3D printing technology, it seems like it should be within reach for motivated tinkerers.

Has anyone here attempted to create their own metal 3D printer? What were the challenges you faced, and what kind of progress did you make? Let's discuss the potential barriers and share our insights on this exciting project!