But that isn't translating to real life.
Take my neighbour and his Model S. The moment you switch on the headlights and heater, which one does quite a lot in the UK, the range is almost halved. These studies are calculated using pie in the sky manufacturers figures, not what people are actually experiencing.
Oh, and if you visit the Leaf forum you'll see the latest model regularly reaches the same condition at 70 or 80,000 miles, owners struggling to get 50 or 60 miles out of them.Make a cuppa and spend some time reading their woes.
The bottom line is these "studies" are making assumptions about certain attributes of these vehicles when making their calculations, and these assumptions are not what is being experienced by owners. Conversely, they all assume some kind of 'real world'figure for the ICE models they're comparing them against, so they're introducing bias from the point of first datum.
And the only thing that requires less maintenance is the engine. Brakes, suspension, steering, tyres, etc, haven't gone away, and the secondary (and sometimes multiple) cooling systems for the batteries and inverters on many models are bringing new maintenance demands. Look in ICME and you'll see service times to conduct the work and the mileage/intervals aren't actually reduced very much at all.