Despite its image as an outdoor-friendly brand, Subaru hasn't launched an all-electric vehicle -- until now. The 2023 Solterra is a compact crossover EV that's based on the Toyota bz4x. How does it compare to rivals like the Volkswagen ID.4, Volvo XC40 Recharge, Ford Mustang Mach-e, Hyundai Ioniq 5, and Kia EV6? Read our review to find out.