How about miners censoring transactions in the future? You think this is not possible? I have read couple of posts concerning this.
Miners censoring transactions would require an amount of centralization that's probably nothing short of what is required to run a 51% attack. As long as
some miners are willing to mine a "blacklisted" transaction it will enter the blockchain eventually.
One of the fears is that transactions can be censored if mining is centralized by a single group/entity.
The minute Bitcoin is controlled by a single entity it's dead. That has been known from the beginning. And it's luckily very unlikely to happen.
The entity can even decide to stop mining altogether when mining equipments become scarce or hard to produce
Any major miner stopping mining altogether is a win for decentralization as other miners take their place. If ASICs for some reasons stop existing, people will regress to GPU and CPU mining. Simple as that.