But, that also depends on everyone's situation. I am glad that I have free Supercharging with mine - I don't plan to charge at home, ever, as I live next to a Supercharger. Electric rates for me are almost close to the Supercharging rates (average $0.24, versus SC, which I believe is $0.32)... The proximity to the Supercharging station just makes it a no-brainer to charge up there.
Live next to a Supercharger? I Iive 2 miles away, so it is way out of the way for me.
I am hoping to make my home charging free also, if they every get my 9.6 KW of solar installed!!