I hope you're right, but PHEVs are fundamentally gas assisted electric vehicles - the reverse of traditional hybrids.
Although that's the common belief and even what I believed before I got my Clarity, once I got it I was surprised to realize just how similar, nearly identical it is in fact to a regular hybrid as far as the use of HV and EV modes.
What throws everyone is the HV button on the Clarity, whereas Insight (like other hybrids) has an EV button. But in the end it's the same thing, a button to change between HV mode and EV mode. The difference is that a hybrid defaults to HV, and you press the EV button to go into EV mode. Whereas Clarity defaults to EV and you press HV to change to HV mode. The reason for the difference is simply scale, EV mode in a hybrid has a lower range and speed and is thus used less often, so HV is the default. Whereas with a PHEV it is assumed that EV mode is the main driving mode if you have enough charge and so that is the default.
In fact both hybrid and PHEV versions have an EV indicator that pops on when the car is driving on battery power only, and in both types of cars this EV indicator will pop on even when in HV mode. That is true for both Honda and Toyota.
The other thing that throws us is the scale. A PHEV goes WAY farther and WAY faster in EV mode than a hybrid. So much so that it causes us to think of it as a BEV with a gas engine. But it's really not, it's a hybrid with a larger battery and motor.
And yes as css28 pointed out in the other thread, you need a charger, and more robust battery cooling. And a way to heat the car during long periods without using ICE. So yes those are points on the BEV side.
But I think the real clincher is that the gas engine can directly drive the engine. That's what makes it a hybrid, a PHEV, not a PHEVx. A BEV with a gas engine would be something like the BMW i3 REx which will never use gas as long as it has enough charge left in the battery, and when it does switch to gas the gas engine only runs a generator, it never directly drives the wheels.