I had a Leaf for 2 years. Maintenance costs were practically nonexistent (more than covered by the wildly overpriced, and still low, up-front prepayment). Seems all they did was change an air filter a couple times.

EXCEPT the tires. A surprisingly under-reported (hopefully because it may have been resolved) issue with EVs is they can wreck tires in a hurry. IIRC, I had to replace "65,000 mile" tires in 17,000 miles because they were near bald. That glorious incredible acceleration EV owners so enjoy when taking off from stoplights? the enormous torque tears that rubber up fast. Fortunately there are now tires built specifically for EVs and their intense strains, but I've not seen reports on how they're doing and expect they're relatively much more costly per-mile than tires for ICE vehicles.

Tesla and Chevy have sophisticated cooling systems for their batteries. The Nissan Leaf does not. IIRC Nissan has had considerable battery degradation issues in hotter climates, like Arizona. And a failed battery is one heck of a maintenance cost.

Yup, and only one of those makes you wait months for maintenance appointments