What's the feasibility of this being an option in the future? It would perhaps allow RWD cars to launch better and thereby close the gap with electric cars?
Back in 2012 students converted a front wheel drive car to a hybrid with two electric motors:
Turn Your Car Into a Plug-In Hybrid for $3,000
Students at the University of Middle Tennessee have installed a full plug-in hybrid kit in a stock 1994 Honda Accord. The setup gives between 50 and 100 percent better gas mileage with two electric motors delivering power directly to the rear wheels, leaving the engine-powered front wheels to work with little effort. The price of all the parts comes to about $3,000 and can be applied to almost any car.
Turn Your Car Into a Plug-In Hybrid for $3,000
https://www.proteanelectric.com/f/2018/04/In_Wheel_Electric_Motors_AFraser_ProteanV4.pdf
Back in 2012 students converted a front wheel drive car to a hybrid with two electric motors:
Turn Your Car Into a Plug-In Hybrid for $3,000
Students at the University of Middle Tennessee have installed a full plug-in hybrid kit in a stock 1994 Honda Accord. The setup gives between 50 and 100 percent better gas mileage with two electric motors delivering power directly to the rear wheels, leaving the engine-powered front wheels to work with little effort. The price of all the parts comes to about $3,000 and can be applied to almost any car.
Turn Your Car Into a Plug-In Hybrid for $3,000
https://www.proteanelectric.com/f/2018/04/In_Wheel_Electric_Motors_AFraser_ProteanV4.pdf