Alphabet’s “moonshot factory,” known as X, has long cultivated craziness in its edgy projects. Perhaps the most outlandish was Loon, which aimed to deliver internet via hundreds of high-flying balloons. Loon eventually “graduated” from X as a separate Alphabet division, before its parent company determined that the business model simply didn’t work. By the time that balloon popped in 2021, one of the Loon engineers had already left the project to form a team specifically working on the data tran...