It'll be interesting to see how far out they stretch the service intervals - with many ice vehicles getting 15-20 k service intervals now, it's hard to imagine going much further without suspension / linkages / brakes etc needing a check. Then add in the likely need to hook up to computers for analysis / battery checks etc . Oil and air filter changes are a very small part of the cost of servicing
As an EV owner I haven't had a dealer service checkup in....ummm....gee, make that ever. And I'm closing on 70,000 miles.
In the US each state has an annual safety inspection which covers a look at brakes and tire wear and lights, but otherwise suspension is not something that requires a special look-see unless the driver notices an issue. With the EV regenative braking taking over the lion's share of daily stopping, most brake sets are so rarely used that they can go 100,000 or more miles before they even begin to show any signs of wear, if at all. I know it has been suggested by the manufacturer for owners to tap those brakes periodically to make sure they don't rust from lack of use.
We also have our own vehicle specific apps downloaded to our phones or tablets to check various battery points for health, voltage, and ampature. The app I use for my car is called LeafSpy and communicates to my car via a simple dongle plugged into the OBD-II port under the dash. Easy. I check the car's internal computer every month for my record keeping. It takes a grand total of about 2 minutes while I sit in the driver's seat with my phone app up and send the LeafSpy screenshots to myself via email attachments. No need to have a dealership or mechanic run diagnostics. We have it all in our own pocket.
Oil? Nope. Air filters? One in the cabin of the car that takes a few minutes to change once every 40,000 miles. I'm lazy enough to have my inspection mechanic do that for me because mine is located under the dashboard, but changing it is something every owner can do fairly easily. That cabin filer costs about $7. My mechanic did the swap for free. I'll have my son do the next cabin filter change for me at 80,000 miles. My son is also free, although I may "pay" him with a deli lunch.
The only time my dealership ever sees me is when I stop in for a free Level 3 charge (on their dime). The only time my mechanic at my local inspection station sees me is at the annual safety inspection mandated by my state, and the only time my car's hood is opened is to show interested folk what an electric motor (packed under the hood in my case) looks like. Our tire place sees me the most due to my free lifetime tire rotation every 7,000 miles on the tires I buy from them.
EVs are a totally different ball game. My hybred still requires all the annoying mechanical overseeing because of its ICE, but all those wearout parts are being extended timewise because we just don't drive it much at all anymore. The EV is our daily vehicle of choice. Wanna guess why? (Hint: EV torque is addictive, the silence is blissful, no emissions is a major health plus, and no gas EVER is awesome!)
Until you've tried one, or own one, you'll never completely realize how truly fabulous and maintenance free the modern EV is today.