The silent, 'irrelevant' majority shall defend the original consensus rules with their full nodes
Discussion
Except everyone will be running on Umbrel and umbrel will decide for them 🤦♂️
If they change the rules they won't be on the same network anymore. People who understand Bitcoin enough to run Umbrel would be aware of this fact.
Besides, it's easy to switch to Citadel, Start9, etc.