Granny charging is the recommended way to charge a Tesla. I'd get a spark to make sure everything is ok first though.
I’m not getting anywhere like 4 miles on mine. I did only get it in October though, so all the driving has been winter driving. And it is a relatively heavy car. The practicalities of public charging just aren’t workable IMO. Not yet. There’s a petrol station pretty much within 5 or 10 mins of wherever you are at any given time, and it rarely takes more than 5 mins to fill up and be on your way. The amount of extra planning it takes to find a public EV charger, how long it takes to charge, the myriad of providers and payment options, just isn’t fit for mass consumption IMO. I love my EV, but there’s no way I’d have got it if I was having to rely on public charging.
I'll never go back. It's just so easy, haven't visited a petrol station in years, only had to top up at a Tesla Supercharger once, and it was done by the time I'd finished my burger. Don't have to worry about oil changes, new exhausts, transmission problems. Just peace of mind.
I got my latest one in September. The average peaked at 4.1 but has dropped back to 3.9 over winter. I expect it to be back over 4 again soon. Like Rosco, I'd never go back. But I appreciate that others would see things as an issue that just don't worry me. For example: a. The number of times I rapid charge are actually pretty small even though I do quite a number of miles. It is only needed when travelling more than 200 miles in one day. The time it takes to charge doesn't concern me - The range of the car is more than the range of my bladder (and my need for coffee). I plan the stops for when I would stop anyway. b. I don't give a damn about any of the myriad of payment options. It is simply this - I pay for everything else in my life with my contactless card. If a charge point operator doesn't offer contactless payment, I don't use them. All the good ones do anyway. Some of the awful ones need to go out of business. It is undeniably more difficult when you can't charge at home. But its not impossible and plenty of people do it. The majority of drivers in this country drive under 10k miles a year. That's 200 miles a week. That means, for the majority of EVs now, charging once a week. Is it a bit less convenient than popping to the petrol station - yes, absolutely. But worth it in my opinion because they are just.....better. Better to drive. Better for the local air quality. Better for the planet. They are not perfect. Stuff needs to happen, tech needs to keep improving, the infrastructure needs to keep improving. But perfect is the enemy of good.