Re: The date seems very optimistic
You can easily buy expertise in these areas
I don't believe that's the case. All the car makers are looking to build competence in EV design and manufacture. It's a seller's market for these skills at the moment, with a shortage of capability in things like traction battery engineering, traction electronics, power management, automotive motor control systems, and the like. And continuing skills like body engineering need to adapt for a completely different way of building cars. Relative to demand there's few engineers with actual experience, so people have to grow their own (and live with the risk of attrition).
A relative of mine works on production line control systems, and although he's always been UK based, he's now been assigned to a huge "no expenses spared" project on the US West Coast on EV manufacture because of this global skills shortage.