Good article in favor of federalism. It is a reminder that leaving much but not all of the power to the States allows them to become political “testing grounds”, mini experiments in different economic styles, governing styles, etc, without having to constantly wonder “WHAT IF?” while still allowing the theoretical freedom to “vote with your feet” by moving to a different State of the Union to try something new. With confederalism, you may end up with border situations, different currencies and a lot of duplication of work.
This ends up working more in favor of businesses rather than individuals these days BUT the principle applies still.
Federalism is _not_ an authoritarian “one size fits all” govt. This is why it’s important to watch out for excesses in either direction.