The new EV from car manufacturer Caterham has no entertainment just screen mirroring to reduce its weight [1],[2].

As for air conditioning (heat and cold) there's more efficient heat pump system that's being used by Tesla that's 3 times more efficient than the conventional system [3].

1) Caterham V: Lightweight EV sport car without infotainment (just phone mirroring)

https://news.ycombinator.com/item?id=41719818

2) Caterham Project V:

https://caterhamcars.com/en/models/projectv

3) Heat pumps make new Tesla more efficient:

https://heatpumpingtechnologies.org/heat-pumps-makes-new-tes...