But it's not like improving twitter would improve the world like nuclear fusion, better batteries or a cure for cancer would. It's hard to even establish metrics for what "improvement" or even "success" looks like in the case of twitter. From Musk's standpoint "improvement"/"success" means he makes money (or at least doesn't lose a lot of money) on the deal. There are plenty of alternatives to twitter out there already and probably others being worked on.