Is it obvious? Waymo has hundreds of driverless taxis in SF where you literally cannot sit in the driver's seat. Stuff that consumers can currently get their hands on isn't really driverless but the tech exists now.
One of the defining features of L4 as everyone else uses that term is that you are not required to take over, even in emergencies. L4 capabilities don't prevent you from voluntarily taking over, it's simply not required that you be able to in order to operate the ODD. Both Cruise and Waymo operate test fleets with drivers who can take over, incidentally.