Surveilling Miniature Attack Cruise Missile (SMACM) status

what is the status of SMACM , is it still in development or it have been canceled due to the development of SDB II ?
why do you think USA produce SDB I and SDB II instead of SMACM ? it seem that SMACM is alot more superior :
1- it have more range 370 km compared to 100 km ( Spear , SDB I ) and 70 km ( SDB I )
2- it fit into same space as normal SDB but the the missiles it self carry 4 smaller missiles ( LOCAAS ) thus allow it to attack 4 targets with each SMACM or overwhelm a single target air defense ( like a ship ) thus make it even superior to SPEAR III under development
3- it have engine allow it to fly at much faster speed , probably mach 0.8 compared to very slow speed of SDB I , II , also an engine also mean the missile can be launched from low altitude allow Nap of the earth tactic
4- choice of two seekers Tri-Mode seeker combining milimeter wave RF radar, an Imaging Infrared (IIR) and semi-active laser (SAL) , Tri-Star Seeker” is a combination of MMW, active LADAR , Thus much harder to jam

http://www.defense-update.com/products/s/smacm.htm