SD cards are what the 3D printer uses (and my camera uses), so as you might imagine, when your day job is making 3D CAD models for 3D printing, the SD card reader does have to deal with me taking the card in and out. I mean, that's what it's, like, there for; it's not for long-term storage (I have a back-up HDD and external HDD and flashdrives for that), we only have one explictly for SD cards to be put in to have the data put on and off to be transferred to a peripheral. If normal use is enough to wear them out that fast... I mean, that's bad design akin to a DVD player wearing out because you're putting in different DVDs.