Natural development of a decentralized network, over time there will be disagreements of what exactly Bitcoin is and how it should run. This will lead over time to more competing node software which will slowly implement unique updates to the network that slowly competes to become a part of the code that reaches consensus.
This is how Bitcoin evolves.
That "natural development" and "exactly what Bitcoin is and how it should run" currently includes the (forced and funded) direction of Core developers including non monetary data on Bitcoin's network, enough to support permanent storage of CSAM. Not sure why you didn't mention that?
The nodes that do things that negatively impact the network will be forced to shift away from such practices over time organically.
In a truly free market there are going to be people who do things that others disagree with. The details don't matter, people don't need to update their nodes at all if they don't agree with new policies, just use the last universally accepted version of node software until disagreements come to their natural free market conclusion.
