Will companies be forced to design products that can be repaired in any state? Or are there ways they can still restrict repairs for states without right-to-repair laws?
I imagine they will simply only provide the required parts/software/documentation to customers/repair shops who prove residency in a state that has these laws.
They will do a cost-benefit analysis, I'm sure, but most likely it'll just turn into small businesses not selling in the restrictive states, and large companies making different versions. One of the versions will probably be better in almost every way except lack of right-to-repair compliance.
What if I buy in WA, from a WA store and a WA manufacturer but live in ID?
It'll follow WA laws. You could live on the moon for all anyone would care, if the sale is in WA, it's covered by WA laws.