> Our goal should be to be 100% renewable.
No, our goal is to reduce CO2 emissions as quickly as possible.
Shutting down coal plants is a quick and easy win, as pretty much every possible replacement is less polluting. It might even make sense to replace them with gas turbines: base load today, peaker plant tomorrow, emergency source later on.
Reducing is frivolous today. We will break through the tipping point in 2030. This will be the coolest century this millennium. There's no way to stop it. We needed to shut down emissions years ago. The only thing we can do proactively is invest in moon-shot tech such as fusion and ocean wave generation and wait for the planet to recover.