We will eventually get to a state where solar and wind is all we have/need. The requirement will be gridscale energy storage that contains enough storage for days of operation.
New York phased out their last coal plant already, so they've moved onto the nuclear+renewables+gas stage and are only tweaking the mix on their way to 100 zero carbon.
(Also "dual fuel" basically means gas, but with the ability to burn other stuff if they get into shortages, but its basically a last resort, its 99% gas)
Put solar panels on literally every building. Put wind mills where you will. We know we need to do this. No nat gas or coal, we do pump storage. When we can, we do the next gen batteries at massive grid scale.
We dont need to shutdown anything early. Those are all amortized for their time. When we can, we eliminate those things as they come of age.