Tesla has officially ended its Dojo supercomputer project, closing out a four-year effort to develop one of the world’s most powerful A.I. training systems and marking a major shift in Tesla’s A.I.

Nvidia’s desktop supercomputer went on sale Wednesday, evoking FOMO from some tech enthusiasts who weren’t able to get their hands on one and raves from those who did. But the DGX Spark may not be a ...