SummaryCompaniesElon Musk's Grok is seeing minimal adoption in US government - even though it's cheapGrok lags far behind OpenAI and other rivals that analysts call more capableData shows uptake by corporations is also weak, suggesting Grok's problems stretch beyond governmentWASHINGTON, May 21 (Reuters) - SpaceX’s initial public offering is set to be the largest in history, partly fueled by its promise to grab a chunk of what it calls a multi-trillion-dollar market for artificial intelligence s...