From what I understood, it was not necessarily the quality of the SD card the problem, but that the rpi was lacking a capacitor or something like that preventin

From what I understood, it was not necessarily the quality of the SD card the problem, but that the rpi was lacking a capacitor or something like that preventing the current to be shut instantly when there is a power cut or a shutdown. And sdcard don't like at all sudden loss of power in the middle of a 'write' or 'refresh' command. Cards death or corruption happened to me a lot even when taking care with rpi but never when using beaglebones.