"Barely functional" in what sense?
The ease with which you can make oil-based fuels convert chemical energy into mecahnical motion, is the reason that EV development largely stopped until quite recently. Efficient EVs are the pinnacle of materials and electronics engineering.
15-20 years from now, they'll likely look more like the pinnacle of engineering, but they are actually pretty crude right now.
The efficiencies of the various powertrain components are very high (eg, charging efficiency and motor controller efficiency). I really don't see how they can be improved by very much.
The main area of improvement is the battery.
>they are actually pretty crude right now
Interesting. I am assured that they are the latest and greatest in motorised transport!
> Interesting. I am assured that they are the latest and greatest in motorised transport!
These two concepts are not mutually exclusive.
Hopefully by then, we'll have solved the problem of how to sustainably fuel both the manufacturing process and the fuelling of EVs.
Bear in mind that no-one cares about things like iPhone integration, reversing cameras, lane assist, or any of the other pointless crap that overcomplicates modern vehicles.