If you want to figure out how that translates into being a good place to live, you really need per capita income rather than per capita GDP and you need to adjust it for purchasing power parity.
Even with those numbers, you really need to look at the distribution. Places like California are a great place to be rich and a pretty good place to be poor. You don't want to try to make it as middle class or probably even lower upper class there. Places in Mississippi with decent public school options are pretty good places to be middle class and upper class unless you really want amenities that come with more densely populated areas.
I wasn’t talking about measuring how good a place is to live, economically. That’s going to always be infinitely subjective and tied to numerous variables that are different from person to person. I was replying simply to the health of a given economy in a state, which is what was mentioned in the posts I replied to. And the only true, objective measure of economic health in a region is productivity.
Since you brought up California, they are of course very productive on the whole, economically….considering they are the world’s 5th largest economy or whatever it is now. But for per capita GDP, they aren’t even Top 3 in the US, as they lag behind Washington, North Dakota (surprise appearance), New York, and Massachusetts. And they also aren’t that far ahead of a few others. So, one might argue that they are still underachieving in spite of their overall GDP as a state, based on certain policies. And those would then lead to your referred “great place to be rich / bad place to be poor” scenario.
As for Mississippi, its where everyone already knows it is without pulling up the map. And 49, 48, and 47 (West Virginia, Arkansas, and Alabama) are all right there in their normal spot also.