Cost, particularly if it's not really necissary. There is a real range of what it can cost depending on the house set up.True but if you are going the EV route, why not just go ahead and get the quicker level 2 system and have the power line ran for it?
When we got our EV, I thought for sure I would get the electrical work done to have level two charging in the garage. After three years of ownership we've never had a need for anything more than the standard 120v outlet that was already right next to the car and with the electrical box on the far side of our finished basement it would be at least a couple thousand to get it put in, if not more.