He can't stop, because he believes it all, and without anyone who dares tell him to stop it, he will keep on doing it. Emporer's new clothes an all that. I'm sure everyone in Tesla wince when he tweets, but what can they do?
As others have noted, FSD beta will proceed at its own pace, with releases as and when they are ready. Speculating/salivating over the next upcoming release is a fools game imho.
I find it hard to get excited by anything Tesla since the Model Y.
Everything since has been overhyped, over-delayed, or compromised in some way.
Musk was the right CEO for the rapid growth phase, and navigated Tesla through some treacherous waters.
However to go mainstream and sell to the masses (not just the guys who had v1 iPhones).. they may need a transition plan.
FSD, Cybertruck, Roadster, Falcon Wing Doors, Yoke, Stalkless, Plaid speed w/o properly matched brakes..
They are starting to see a lot of competent & attractive competition at each price point they compete.. with gaps being filled as well.
Tesla over-optimizes for minimizing SKUs and supply chain.
So at the higher price points you have luxury makers competing with a much more complete package.
At the lower price points you have VW, Ford and Hyundai/Kia undercutting especially with tax credits. Not to mention Bolt clear out..
And then everywhere in between you have other form factors being offered that Tesla hasn't yet or won't.
Such as city car, basic commuter car, true sports car, pickup, normal SUV, minivan (soon), etc.