A plug-in hybrid is just a stop-gap to pure EVs. It's inefficient to carry around several gallons of gasoline and an engine with all the extra connections between them. There are more parts to fail also. We just need faster charging and more charging stations.
Sure, there are no street-side pumps. But you can't easily run gas pipes to the street-side pumps. And it's cumbersome to maintain and calibrate the pump. On the other hand, an EV charging station is easy and almost maintenance-free. Once you install it, you'd make money with it.
There are no parking lot pumps either, but there are countless charging stations. They are cheap to build and maintenance-free. As long as you can run the street lights, you can build the charging stations next.
A plug-in hybrid is useful at this point. But in a few years, as EVs charge faster and gain longer ranges, they'll disappear faster than gasoline cars. I drove i3 with range extender. I had to use the engine twice over 3 years of the lease. You get used to having a shorter range and plan appropriately.