Not to mention the fact that electricity gets surprisingly expensive at peak rates. I recognize we are doing this to try to reduce carbon emissions, but I find it important to remember that energy is neither created nor destroyed according to the laws of thermodynamics. So, we are only transitioning from one form of energy to another, which has its own pros and cons. Of course, electric "seems" to have more pros then cons, but it definitely still has cons (heat generation, lithium/battery tech byproducts/electricity generation byproducts, etc.), and no energy source is really ever "free".
Disclaimer: I don't have a Tesla but do drive a plug-in hybrid. It feels like a nice balance of gas/electric at the current time.