Re: No second hand market
You of course didn't read the part where I mentioned this might not apply to electrics. In the case you quote it doesn't. In conversions/retrofits it probably does.
It is *certainly* illegal to retrofit an ICE engine or ICE hybrid with remote start and the legality/insurance is dubious even if it's a manufacturer fitted item. Some insurers wouldn't bat an eyelid if it was related to an accident - some would, to quote Dan Halen, "bend you over, and rape the money out of you".
If the engine is running someone has to be attending the vehicle unless it's on private land such as a farm. Carparks, driveways pretty much anywhere if the motor is running you need to be sitting in it in easy reach of the controls.