There was plenty of euphoric excitement over all things electric vehicle (EV) a few years ago. Every investor wanted to find the next Tesla. One way to play that was to invest in a company that would support the overall growth of EVs, rather than trying to pick the next successful EV maker. That's why shares of solid-state EV battery company QuantumScape (QS -3.54%) soared in late 2020 after the company went public. But much of that excitement was premature as the adoption of EVs and the development of new ...