Shares of small semiconductor manufacturing equipment company Aehr Test Systems (AEHR -0.33%) -- provider of silicon carbide (SiC) test and burn-in machines used in electric vehicle parts production -- have made a stunning round trip the past few years. As auto sales, and especially EV sales, started to heat up during the pandemic, Aehr stock skyrocketed into investors' collective consciousness, owing to the critical nature of its manufacturing equipment.But times have changed, and EV market growth is slowi ...