Yeah, you're right. Because we can't solve ALL the worlds problems in short time, there's no point wasting any effort on it. Good point. Lets all give up.
And you're right again, most people keep their cars locked in a garage and never drive them during the day ... all that wasted effort ... all those poor 1'000s
of Uni students time wasted .... but then ..
In the last 30 yrs, several designs (some major) have been snapped up from WSC development teams and gone to Electric vehicle / solar power systems.
The cars themselves are NOT final production-ready, they prove a technology. Like our 98.5% wheel motors, low loss tyres, cell encapsulation etc etc
Design criteria include - the car must maintain 50-70Km/hr from sunlight only ... but there's no point because they don't work in -100C, at night, up mountains ... sad :-)