To predict buying an AI company or starting it earlier, I don't think there is an agenda for Elon to do it, because previously Elonmusk had previously been involved with the development of this AI technology, and he chose to leave it, so in my opinion it is impossible for Elon to Now. IMO
You are correct that previously Elon Musk was engaged in development of AI technology but later he decided to quit it due to unknown reasons. It is also true that AI was not so popular in the past, the phenomenon of AI has suddenly captured the attention of general public and businesses involved in IT technology worldwide, after the success of CHATgpt as an effective and powerful tool with numerous capabilities. Therefore, it is possible that to maintain his competitive edge in industry, he might change his stance and rejoin it.
That is possible, because Elon is also still developing his neurolinks, and with AI intelligence, it might be that Elon Musk's crazy thoughts can be integrated with paralysis in humans in every chip he wants to make, I think it will be crazier than what we imagine the day This.
But I think he is, not that focus in this case and is not too concerned about him now, today he is busy with twitter, with styles and various changes from management to Twitter icons and various kinds of badges on Twitter accounts and still much more.