I won't be arguing about security. But i have remark about behavior of the portable version. When this version by default creates wallet somewhere deep in the guts of OS where is portability here? I believe that really portable version should handle data file in the same folder where executable is.

I know there is way to assign wallet file from a defined folder. But not create one. Also there are plenty people who able to backup folder with his/her data, but not that many of them able to write shell file to assign wallet file for this binary. Ask them to find where wallet was created and it will be a real challenge.

Portable version should be really portable, otherwise what is the difference with installation?