Feature Suggestion: More than 1 $filename() on Export

I suggest allowing more than one $filename(…) spec on exports so one could split output to more than one file, like maybe making playlists by genre:

$loop(%genre%)
$filename(M:\MP3\Playlists\Master\$if2(%genre%,'Unknown Genre').m3u,ansi)
#EXTM3U
$loop(%_path%)
#EXTINF:%_length_seconds%,%artist% - %title%
%_path%
$loopend()
$loopend()

(Extra line feeds added for readability.)