"Also HVDC power transmission is a thing now."

It has always been a thing, but it still means losses and expenses to build it. If you could have solar panels in the road, you could charge electric cars directly and efficently. But like I said, unlikely to happen.

I mean yeah but "if we had magical technology that doesn't exist we could use it" isn't a very interesting fact.

Solar panels are a very real technology and solar roads are working.

It is just that they are too expensive to make much sense. With many potential new solar tech that is in the pipeline, that might change.