They have sold hybrids at scale, lots of similar components, so no reason to think they can't scale when they have a design they are ready to produce. Toyota runs a huge global car manufacturing company that is known for quality and shipping a lot of cars. They know how to scale.

Toyota reminds me of Microsoft when the internet went mainstream. Very slow to respond, but once they got their giant tanker turned in the right direction they were all in. I suspect Toyota will be the same.