Talked to one of Terrafugia's principals. He told me that they rather continue to do what they have been doing
for over a decade (cause that's what they sold to Geely), then assessing solutions by outsiders.
His answer comes down to what came to be known as NIHS, the Not Invented Here Syndrome.
My solution basically comes down to making the flying and the driving things modular.
Airbus thought similarly. Mine is better though ;-)