Sure, but a good BEV is designed very differently than a PHEV and designing them properly has cost benefits and is an overall better product for customers as we

Sure, but a good BEV is designed very differently than a PHEV and designing them properly has cost benefits and is an overall better product for customers as well (better range, more space inside, etc.). There are plenty of existing manufacturers who have gone down that path and are now shifting attention to getting rid of ICE/PHEV entirely. Also, you need access to battery supply.