Everything is an arbitrary division when we get down to it. Doing away with states would require a complete rewrite of the constitution, and a fundamental shift to the country as a whole. I personally like the Republic concept and ability for states to experiment with things that might not be popular or a priority for the entire country. This will have good and bad outcomes on these experiments, but it’s how we have things like decriminalization, universal healthcare attempts, etc. Without the “all other things not innumerated belong to the states” this isn’t possible, and removing state representation removes that.
Librewolf didn’t take as much adjustment as I would have expected, and it even supports toning down specific security postures for QoL niceties like Firefox account sync. Made the switch just to try it out and haven’t gone back. Excited to see what people come up with for more forks/hard forks in the future.