Nice video, Pretty much my analysis also, for me high driving position trumped the Model 3's advantages and with 250 miles of range the SC network would for 95% of the year, for me, not be an advantage. As you say, frequent long distance drivers the balance might change towards Tesla for SC but in that case I'd wait for the Y rather than a 3. And that's probably 2 years off in the U.K.
main trouble with the Cybertruck in the U.K. would be parking.
If I ever wanted one for fun Or a road trip, id rent. I think it would be very inconvenient day to day