If by ecosystem, you mean social media, then that is not a clear indicator. Miners will always decide the fate of the chain and most run ABC. They need to work with ABC, not against.
Not true. Monero is a great example. If majority of the ecosystem decides they can replace miners easily at will.
Bad actors have to be sidestepped by majority otherwise this is no improvement over the fiat system. Imagine if you had no option but was forced to live under Blockstream's policies.
What would you think about replacing miners with a global supercluster ? (I clarify this excludes any A.I.) ]Such certainly seems achievable. The problem is human greed.