Meta's structure basically makes Zuckerberg unoustable. He can continue to toss money into the ether chasing a particularly bad idea.
Conversely, it's possible to have voting power so diluted that nobody who has a long-term vision has any way to promote it.
Broad ownership allows people to call bullshit, but maybe something like a capital-gains surtax on shares held less than 5 years would make it too expensive to dive-bomb into a company just long enough to sabotage its long-term future.
