Is the model number relevant because 7s, 8s, and 9s have different MCAS, the system that Boeing deleted from the flight manual that contributed to the catastrophes in 2018 and 2019?

Or because the defect in engine inlets and anti-ice systems that can cause the engine housing to overheat and break off during flight, for which Boeing requested an exemption to postpone fixes, is different for each model number?

Or because each model has different pressurization systems and warning lights, that Alaska Airlines "reset" to turn off the light so they could continue to fly, instead of thoroughly investigating and resolving?

Or because not all the models have the same door plug with a loose bolt that blew out?

How much is common among all Max models, and why shouldn't the public be concerned about all variants of them?