High mileage is where pence-per-mile stops being abstract. At 15,000–20,000 miles a year, a few pence difference between petrol and home-charged electric is hundreds of pounds a month — if you are not filling up at motorway rapids every week.
DC charging on the motorway at peak rates can cost as much per mile as diesel — you just spend longer doing it. Home or workplace top-ups are not optional extras at this mileage; they are the whole business case.
Range on paper vs range at 70 mph in February. Models with honest motorway efficiency and a heat pump hold up better on long winter runs. A short-range city car on twice-weekly rapid charging is usually miserable in practice.