For me 400km is the sweet spot. Any less would be impractical, and any more would have very limited utility assuming that the battery capacity doesn't diminish significantly over the period of my ownership.
Whereas for me somewhere around 250 - 300km will be fine.
If I can do Whanganui to Wellington and return, with a fast charge somewhere around the half way point - that's Levin, so the charge could be anywhere from Foxton to Otaki - then I'll be sweet. Particularly if I only need to charge either on the way south or the way north, but not both. My 'usual' destination in Wellington has just put in an EV charge point (blue caravan plug) available to visitors, so I could even top up while the meetings are going on.
My next car will almost certainly be an EV
From a safety perspective I would never drive more than 300km without a decent break, so I certainly don't disagree with you. However, my desire for a 400km range is based on having a buffer of 100km to deal with a couple of what-ifs:
- What if you get to the location where you were expecting to charge and are unable to do so? e.g. long queue for the charger or charger out of order.
- What if your vehicle's theoretical 400km range is diminished because of the use of ancillaries, difficult terrain, or battery wear?
I always aim to refuel my existing diesel vehicle before the range drops below 150km because it just gives me a bit of extra piece of mind.