F2FS experiences

[xyzzy]

- The append only nature of log-structured (F2FS, UDF, etc.) and copy-on-write filesystems (BTRFS, ZFS, etc.) means that there is less inplace writing (compared to appending, and therefore less overall erase. You litterally avoid performing erases (wears the flash) and avoid read-modify-write cycles (bad performance). 

How about that performance?  Since you have flash reformatted to F2FS, try the benchmark I posted earlier.  I think it would be interesting to see how F2FS compares to ext4 with aligned blocks vs ext4 with unaligned blocks.