Upmanship manufacturers is permanent: one, two, three ..... almost ten blades? they change the model and impose a new snap mode for new blades incompatible with the old: an effective way to put the poor consumer in leakage in permanent and expensive before.
Thank goodness that shaving is accurate ... but I, for my part, as the blades wear out very, very quickly and do not take the ten announced shaves.
So more or less programmed obsolescence or it's me who has the particularly harsh beard?