we had a leaf for about 2 and a half years. Absolutely zero maintenance. Like I replaced the wiper blades one year, filled the washer fluid a couple of time, and that was it. I replaced the tires before we turned the car back in (lease). No oil changes, no batteries, no air filters, oil filters, etc. I would assume as the cars get older the lack of any maintenance items would get better for EV vs gas (belts, gaskets, exhaust, emissions systems, radiators, etc. etc).
I'm sure the tires wear quicker, but I get less than a year out of a $1700 set on my current ICE car (heavy with a lot of torque and no self control). The leaf tires were like $300 for a full set. Not going to loose sleep over tire life on an EV. If you are buying your vehicles based on tire life, you probably need to get a life.
At the time with the tax credits or whatever they were doing, the car cost us less than $30/month for the car, plus maybe another $10-30 a month added to our electric bill (wife could charge for free at her office, and there were still free/cheap places to charge at the time). Plus she could use the HOV lane to get to the office and saved a lot of time commuting.
It was a great car and great ownership experience. Lots has changed since then but I would get another one without any hesitation if it fit our needs. I could care less about the "green" aspects of the car, but have to say the whole experience was good for us. Plus in GA if you are charging the car at night, it's basically nuclear powered, as a lot of the base load for the grid in GA is nuclear powered.
Most of the people I know that are buying EVs are doing it because it fits their needs, not because they want a "green" car. Low maintenance, low cost of ownership (depending upon what resale is, government rebates, etc), nice vehicle, good performance, etc.
Until they learn to recycle the batteries, then the "green" aspects of it will increase so they don't have to mine the lithium and other materiels for each vehicle. Battery technology continues to improve as we go along I'm sure.
Battery recyling is def a growing industry. The problem is, there was never much demand for recycled batteries so it did not make financial sense. Now it might. There is a large recycling facility opening in Covington Ga soon https://ascendelements.com/ . If the EV industry could ever come up with a standard battery form and standard connections then I would feel a little better about owning one. Sort of like GM and the small block engines. You can bolt a small block Chevy into all kinds of vehicles from the '60's until now with ease in your own driveway. That ain't happening with EV's - prob never will.