To prove something, a single SSD canÂ´t do that for a large number of drives
Maybe u have a good, maybe you have a bad drive, maybe something in the middle
Still think dead flash-memory isnÂ´t the main reason for defect drives (except maybe OCZ with old Indilinx-Controller, very ugly wear-leveling and real cheap NANDs). Many defect SSDs arenÂ´t recognized anymore, the read-only-mode is very rare.So I think itÂ´s the controller, maybe bad firmware.
The other point is, if it survives one year, maybe this type of SSD is EOL. Then the next drive have other controller, other NAND-finishing (15/16nm)