Isn’t the benefit that it is durable and has much higher charge/discharge amperage limits?

A battery that can charge as fast as you can pump electricity into it, as many times as you want opens up a lot of possibilities.

E.g. a car that has a 200 mile range and a 5 minute charging time is way more useable than a car with 300 miles of range that takes an hour to charge.

I've driven a car that had about a 200 mile range (small fuel tank) and it's annoying on a long drive, given that you don't want to push it to the extreme but start looking for a fuel stop somewhere around 1/3 tank remaining. So you end up stopping to refuel every 2-3 hours. Still better than a 1-hour recharge every 300 though.