The blocksize war illustrated exactly what is outlined above. The majority of miners and exchanges were on the side of the big blockers. The only reason UASF was successful is because the majority of bitcoin holders told them that they can go fuck themselves with their retardation coin. I do not think that scenario would be playing out the same today.

This will surely require a new reminder every 10 years. For example, if the custodian of an ETF gets hacked (looking at you, Coinbase), powerful players will try to push their own Bitcoin.