it was prob mislooked before but there's a patch in that misc patch thread that moves SDL builds to XDG like GTK builds. it would be easy enouh to make everything by default .config or %appdata% but then in the config file have savestatefolder batterystatefolder etc as well as the command line --savestate folder etc then the better "multiuser" way can stay but if desired can be overwritten using the config files or command line