xAI is a failure of an AI company from a consumer perspective. They invested a large amount of money into owning their own infrastructure, while driving away consumers with their right-wing or "alt right"-ish branding and having a reputation of X users abusing the AI services.
Turns out there was another company with a much better reputation for which the compute is a better fit. Now that the data centers are being put to use, they actually make them a little bit of money instead of losing money.
That story roughly tracks the one I hold. One piece that's missing is that grok's / X's image also made it radioactive to the best researchers. 'Aligned AGI' is an easier sell to the best engineers than 'abusive neo-Nazi chatbot with a porn problem'.