There are also some "physics" reasons for this - the source of electric current in an ICE car is usually a 1kWh lead-acid battery - obviously not always at 100%

There are also some "physics" reasons for this - the source of electric current in an ICE car is usually a 1kWh lead-acid battery - obviously not always at 100% state of charge. Even if the designers wanted to put an awesome infotainment system into such car, the battery won't be able to power it for long before jeopardizing driving-related critical functionality. As an example - keeping Tesla's sentry mode on (screen on and cameras recording), drains about 250W - enough to completely kill a classic car battery in 4 hours Electric cars, with their batteries in 30-100 kWh range, lift this constraint - so designers have a field day