Laboratories of innovation
An age old promise of state government independence is the 'Laboratories of Democracy’ claim. This is one I am sympathetic toward. Sadly, sharing (and learning) tends to happen less than we would hope. States do really smart things and then end up being the only ones to do it.
I wish there were better ways to ensure that the best ideas (particularly in tech) are replicated across states.
I do think that this will get slightly better as our state governments take on younger members.