Of course i know it. NAND paranoids , should know about all NAND writtings apps, then maybe the'll understand that NAND writting is a must for many apps, and there is no way to preserve NAND , while using OS from NAND. Only solution for saving NAND is to use OS from SD card.
And because i check every app, i thought it will be nice to inform every NAND Paranoid that many OS-Binded apps writes a lot of cache files on NAND [like thunar..]