Our respective experiences in the same car proves that the decision on whether a PHEV is right for someone heavily depends on what proportion of their total mileage is going to be within the EV only range, as EV mileage works out very cheap, but on longer journeys when the battery is depleted there is no advantage over a fuel efficient ICE car. I stress that I am still making a very small saving (up to £20 a month) over the BMW, but I’d personally sacrifice that £20 not to have to plug the car in after every use!
I wouldn’t have another, whils’t I’m getting slightly better overall than you, I was expecting more if I’m honest and more like 75-80mpg longterm average.
For the AP we paid baring in mind they are more expensive now, I could have had a Nissan Qashqai e-power and got similar to what I’m getting now but with change in my pocket!