A lot of your thoughts were the same as mine. We are considering a plugin hybrid to make up for the current shortfalls, lack of charging infrastructure, range anxiety and you introduce a new concept I hadn't thought of endurance.
In an ICE vehicle we still have to consider range but with a full EV range now gets coupled with endurance. The more miles put on the vehicle causes the max to decrease.
I agree that today's battery tech seems constrained, but look 5 - 10 years in the past and the developments and improvements have been staggering. Looking at what is "in the lab" there are some more major leaps to be had.