I’ve got a Hyundai Tucson PHEV which replaced our petrol BMW X1. I’d go back to the petrol BMW in a heartbeat if it were possible (sadly it isn’t if we stay in the scheme). The PHEV is costing £20 a month less to run, but for me that’s not worth the hassle of charging it after every single time that I use it. It’s meant to have a 39 mile EV range but in reality I’m getting more like 32 miles max. Also, the fuel tank is smaller than a normal ICE car. Our petrol BMW could stretch to 600 miles range whereas the Tucson the maximum range, even with a full charge and full tank of petrol is more like 350 miles.
Where I think they score is for people who do mostly short journeys, can charge at home, but don’t want the range limitations of an EV or the need to use public chargers on longer journeys. The problem with PHEVs on longer journeys though is that when the battery is depleted you are propelling a heavy car (due to the battery) with a modest petrol engine. In the Tucson that means returning around 32-34 mpg, which is 10-15 mpg worse than I got from the previous petrol car on the same journey. That eats in to the saving that you make on the shorter journeys when running in EV mode.
Some PHEVs are better than others. Toyota seem to have the whole hybrid thing far better sorted than say Hyundai.
In your case, if you are used to having a BEV and it works for you, I’d personally try to stick with one. I think you’d find a PHEV to be a retrograde step. In our case, if we stick with Motability (which is looking unlikely) I would consider a BEV next time if the numbers stack up. If we leave the scheme then my preference would be to get an ICE car, although I’d consider a PHEV if it was something like the BMW X5 which has a better EV range and when that runs out it falls back to a 3.0 litre six cylinder petrol engine, which would be a darned sight nicer than the 1.6 litre Hyundai four cylinder!