Of course burning that gas to generate electricity for use in heat pumps would get you the same heat for half the gas even before you include any wind power (or hydro etc.)
That then doubles your storage for gas that you may or may not need to burn depending on the weather.
So really the path to fully renewable just goes through a series of win-wins on the journey to fully phase out fossil fuels.
Sure, switching to heat pumps doubles (probably triples) your storage, or, cut the storage energy in the form of gas by 66%. But, I thought we were discussing decarbonzing the storage too. Looking at that amount of energy, (chemical) electrical storage isn't even in the right ballpark yet. And other forms neither.
That then doubles your storage for gas that you may or may not need to burn depending on the weather.
So really the path to fully renewable just goes through a series of win-wins on the journey to fully phase out fossil fuels.