Never had problems with those either, who made those Android devices with such short-lived eMMC chips? I'm using a number of old Android devices from both well-known manufacturers like Motorola, Samsung and Sony as well as lesser-known ones like Ainol, none of these suffer from memory-induced slowdowns. In my experience it is the battery and the touch screen which are most likely to give out first. The battery can be replaced, sometimes the touch screen can as well but I tend to just use those devices for purposes where I don't need a screen (which I often actually just disconnect to save power) such as MPD-based media players, a trailer camera and IP cameras.