When Mazda introduced the MX-30 small crossover to its already comprehensive small-vehicle family in March 2021, it wasn’t immediately obvious how it fitted in. With the CX-3 looking after the compact-SUV crowd, the Mazda 3 taking care of the hatchback audience and the CX-30 filling in any gaps between them, how could the mechanically almost identical MX-30 find any attention at all?