Nonetheless, I often go a week between shaves nowadays and this seems to be much more socially acceptable than used to be the case.
As an aside, I'm pretty sure they are incrementally tweaking the chemistry of the blade-front indicator to break down more rapidly, which destroys the uniformity of the leading edge. IMHO older cartridges actually last longer. If you find a stash in the developing world or some other slow-moving place, buy them.
However, reading your comment, I wonder if my Mach III blades (purchased in India) are different in the metal composition from what I would purchase now in the USA.
As a bonus, mineral oil is a decent shave gel on its own, though it can be difficult to wash out the whiskers and gunk from multi blade razors.