Right, so what vendors are doing now is calling batteries consumables that last one, maybe two years with the default 100% charging limit to get max run time on

Right, so what vendors are doing now is calling batteries consumables that last one, maybe two years with the default 100% charging limit to get max run time on battery. Consumers can either accept this and pay for a new battery every few years, or if they want they can limit to 80% and get way longer life battery life if they can live with the reduced runtime. I'm not aware of any vendors claiming x capacity battery with mandatory limiting charging to 80% of x, rather its an option you have the choice to explicitly enable.