It' not an obvious thing to most owners that the car has to be in ready mode but neutral gear (if I'm right and you do indeed need to be in ready mode to select neutral). I think that's because of the permanent magnet motor, which will generate voltage when the drive wheels are turning, and even if the car is off, the IGBT free-wheel diodes will conduct and cause the big capacitors to charge up, possibly quickly enough to cause damage. Worse than that, above a certain speed, this voltage is too high for the electronics to withstand; this will cause serious and expensive damage, as well as possibly causing a drag on the wheels and possibly a fire hazard.
It seems to me that in neutral, the IGBTs will actually have to be fired up and producing pulses to actively counter the magnet's field (i.e. initiate field weakening), in order to keep the voltage generated by the motor at an acceptable level. If I'm right, then when in neutral, an EV is far from inactive (as an ICE car in neutral gear would be).
Cars like Teslas that use induction motors may avoid this, as induction motors don't have permanent magnets. But it's possible to use an induction motor as a generator, so it's unclear to me whether it's really different as far as neutral "gear" is concerned. It may be that residual magnetism in the induction motor's rotor may be enough to cause problems, although it seems unlikely as I type this.
Edit: To avoid all this, you would normally tow an EV such that the drive wheels are off the ground. In an AWD EV, this may not be possible, as all wheels are drive wheels. So you may need a tilt tray for an AWD EV.
