Disconnecting from the grid is overly romanticized. What you get from paying the utilities is a team of people who will fix equipment issues due to failure or the environment. If your home battery system has issues, scheduling someone could take a day or more. Off grid electrical services isn't popular enough to be on call 24/7. And getting parts may get take even more time. Equipment failure could take your electricity out for days or weeks. Being fully off grind means over provisioning your electrical storage and production, adding to costs. You also would not be able to sell your excess electricity. Also, in terms of house value, I imagine more people value the peace of mind of a connected electrical grid over saving the small fixed monthly connection fee.