I'm agree with you but arcade board of ddr 3rd mix to Extreme is just a Konami system 573 a PS1 based board that Mame can run it very well, but those games that You posted previously
DANCE 86.4 FUNKY RADIO STATION (E01:J:A:A:2005040400) [Taro]
Dance Dance Revolution Karaoke Mix 2 (GQ947 VER. JAA) [Taro]
Dance Dance Revolution SuperNOVA (FDH:A:A:A:2006071300) [Taro, Windy Fairy, Shiz]
Dance Dance Revolution SuperNOVA (FDH:J:A:A:2006090600) [Taro, Windy Fairy, Shiz]
Dance Dance Revolution SuperNOVA (FDH:U:A:A:2006072400) [Taro, Windy Fairy, Shiz]
Dance Dance Revolution SuperNOVA 2 (GDJ:A:A:A:2007100800) [Taro, Windy Fairy, Shiz]
Dance Dance Revolution SuperNOVA 2 (GDJ:J:A:A:2007100800) [Taro, Windy Fairy, Shiz]
Dance Dance Revolution SuperNOVA 2 (GDJ:U:A:A:2007100800) [Taro, Windy Fairy, Shiz]
Dancing Stage SuperNOVA (FDH:E:A:A:2006072500) [Shiz, Windy Fairy]
DrumMania V (E02:A:A:A:2005050200) [Taro, Windy Fairy, Shiz]
DrumMania V (E02:J:A:A:2005050200) [Taro, Windy Fairy, Shiz]
DrumMania V2 (F02:A:A:A:2006011201) [Taro, Windy Fairy, Shiz]
DrumMania V2 (F02:J:A:A:2006011201) [Taro, Windy Fairy, Shiz]
DrumMania V3 (F32:A:A:A:2006101800) [Taro, Windy Fairy, Shiz]
DrumMania V3 (F32:J:A:A:2006101800) [Taro, Windy Fairy, Shiz]
Guitar Freaks V (E03:A:A:A:2005050200) [Taro, Windy Fairy, Shiz]
Guitar Freaks V (E03:J:A:A:2005050200) [Taro, Windy Fairy, Shiz]
Guitar Freaks V2 (F03:A:A:A:2006011201) [Taro, Windy Fairy, Shiz]
Guitar Freaks V2 (F03:J:A:A:2006011201) [Taro, Windy Fairy, Shiz]
Guitar Freaks V3 (F33:A:A:A:2006101800) [Taro, Windy Fairy, Shiz]
Guitar Freaks V3 (F33:J:A:A:2006101800) [Taro, Windy Fairy, Shiz]
Thrill Drive 3 (D44:J:A:A:20050316) [Taro, Windy Fairy, Shiz]
Toy's March (E00:J:A:A:2005011602) [Taro, Windy Fairy, Shiz]
Toy's March 2 (F00:J:A:A:2005110400) [Taro, Windy Fairy, Shiz]
are based on Konami Python and Python 2 a PS2 based Arcade board and MAME still can't handle it.