I'm not saying "Twitter is secretly going AI", but as a business perspective it makes sense to keep your moves secret from competitors. Also you don't really get much from revealing your plans as a private owned company, it would make more sense if it were public, but as a private company the only reason you would be showing your plans would be in an attempt to recruit talent.
You see it in Neuralink and Open AI, I would love to know more about GPT4, but this is what we get.