He called Musk's public statement out, because it was wrong. Twitter shouldn't be the place for this, but it's on Musk for creating such unprofessional atmosphere in the first place.
Imagine the same thing with Microsoft. We all know Windows is held together with scotch tape, not to mention that 7 years after Windows 10 they still haven't quite manage to unify the old and the new interfaces, not that Windows 11's new interfaces are any good. What a mess. Except it's not, it's business as usual. Big software projects are messy and hard to manage, but these issues are unimportant when you get the bigger picture right. For Windows the bigger picture is that it runs all your application. This is what makes Windows a good product, the rest is details and can be fixed over time. Preferably in a professional manner.
Imagine the same thing with Microsoft. We all know Windows is held together with scotch tape, not to mention that 7 years after Windows 10 they still haven't quite manage to unify the old and the new interfaces, not that Windows 11's new interfaces are any good. What a mess. Except it's not, it's business as usual. Big software projects are messy and hard to manage, but these issues are unimportant when you get the bigger picture right. For Windows the bigger picture is that it runs all your application. This is what makes Windows a good product, the rest is details and can be fixed over time. Preferably in a professional manner.