In a similar vein, buying an electric razor that is more functional (different lengths, can also be used for hair and other grooming) that lasts years. A razor subscription sounds extremely wasteful.
But stupid jokes aside, I used razors (for my face) only in my teens and early twenties, after that I moved to trimmers and occasional 'canadian lumberjack' look out. Trimmer are good enough for the face, armpits and most of the bush. At this rate I measure the lifetime of (disposable BIC) razors in years.