Why did NY legislators step back from a bill supporting renewable energy?

What is happening? New York legislators are easing off a bill that would have grown its renewable sector because ” Reliability margins on New York’s electric grid are shrinking as more fossil fuel generators retire and non-dispatchable renewables are added, the state’s Independent System Operator”

Why is this important? In New York retirements of generation systems are outpacing new sources and that is impacting reliability margins.

How will this be important? The Independent System Operator also said that by 2040 10% of power sources will come from sources unknown today.

Utility Dive | New York lawmakers abandon bill to grow renewables as state’s grid operator warns margins tightening