(Bloomberg) -- Volkswagen, Renault and Stellantis are thinking the unthinkable, exploring tie-ups with sworn competitors to make cheaper electric vehicles and fend off existential threats.Most Read from BloombergLargest Covid Vaccine Study Yet Finds Links to Health ConditionsCapital One to Buy Discover for $35 Billion in Year's Biggest Deal Amazon Deserves to Be Called Out for Swindling UsersA $6 Trillion Wall of Cash Is Holding Firm as Fed Delays CutsYour 401(k) Will Be Gone Within a DecadeAs C