I have been looking at evs for a while. I can honestly say that in the dozens of listings of nearly new cars up to 3 years old, mainly Enyaq, id.4 & Q4; Where there was a photo of current battery capacity and estimated distance available not one matched or exceeded the manufacturer's claims when the calculations were done. Many were over 20% less than the claimed distance per % of battery capacity. Same with Toyota, Renault and other options that I looked at.
An that is reflected in tests on car review sites like Honest John & Autocar.
In my car there are two range settings WLTP and Dynamic (WLTP is theh European Standard Calculation, and IMO woefully inaccurate, but its what the manufacturers use to determine a standard for vehicle range - something to put in the brochure). Dynamic is based on how the car was last driven (I don't know ihow this is calculated, but it must be over several recent journeys or a certain amount of charge).
On the motorway (at 70mph type speeds) the range is hammered (as is rapid acceleration), but gentle driving especially cross country B-roads 30-50mph can see the WLTP range exceeded
My car is nominally 295 miles on the WLTP - 65kW
I have found the range to be as follows
Winter Motorway = 210-220 miles
Summer Motoway = 240-250 miles
Winter Gentle Driving = 230-250 miles
Summer Gentle Driving = 280+ miles though on some trips I have exceeded 5miles/kw which is 325+miles
My dynamic range in the car when charged to 100% has varied between 220 milkes and 307!!! (307 exceeds WLTP range, but its just a number and depending on the next batch of driving can be woefully inaccurate)
A lot depends on the way the car is driven (just as with an ICE car) and how much ancillary stuff is on, heater/aircon/wipers/lights/etc. Also the battery needs to reach an operating temperature, so the miles/kw can take a hammering initially in winter and then improves as the car warms up. We have found this on long winter journeys and it takes more power to heat the car than it does to cool it down.
Its really no different to ICE in the fact that how it is driven can alter the mpg, but it definitely requires more planning for longer journeys.
Initially in ownership there is definitely range anxiety, and I always making sure that I had plenty of charge, but now I'm much more relaxed about it, and will make journeys where the destination estimate is in single figues (though this is rare), as only a significant diversion would cause an issue, as delays on motorways etc actually play into the EVs range hands! Incidently the destination range calculation I normally better, we left Scotland last weekend wiith 99% charge and showing a destination range of 9%, we detoured off route 4 times to visit places we wanted to (food/specific shops), adding about 15 miles to the journey and got home with 13% showing (no on-route charging and plenty of motorway speeds)