Microsoft Corp. has spent billions of dollars to get people like Tyson Jominy using its Copilot, an artificially intelligent personal assistant designed to make it easier for consumers to navigate the world. But when Copilot pops up on Jominy’s computer screen, it’s typically an accident — the result of a mistaken push of what used to be a control key. He would much rather use ChatGPT on his smartphone, or Grok, which helps him make sense of the rapid-fire stream of posts on X. Jominy, who manag...