i have a lot more body hair than facial hair, so its easier to keep them seperated to know when its time for a replacement without cutting my face up. if blades never wore out i wouldn’t care hygiene wise
To be fair, you could just use new blades for every shave and you will never run the risk of bleeding. Except for money.
No because you don’t need two blades for different types of hair anymore. You only need one blade now, meaning you have effectively reduced your blade consumption by 50%.