You forget that ownership means maintenance. Most replaced parts (engine, wheels, avionics, prop, filters, oil, lights) are generic and the very same ones you’ll use on the other planes you mentioned. The few unique parts that may be needed are in pma production with FletchAir, Roscoe, and some others. the NICE thing is that they supply those parts at a lower price than you’d get from brand B, P or C aircraft. Sure they still make the C172 but have you priced their parts lately?