Somaliland has a headstart on the other autonomous states like Maakhir and Puntland, which in turn have a headstart on the rest of Somalia.
The Somaliland leadership chose early on to focus their efforts on building their region rather than fighting to rule Somalia, so they have a 17 year headstart. Puntland abandoned the idea only in 1998, so they only have a 9 year headstart. Maakhir and Galmudug are just starting their journey.
Eventually all the regions will learn the same lesson, declare themselves autonomous, and the slow rebuilding will begin. The regions that fight to rule Somalia will continue to be the worst areas of Somalia. For instance Southwestern State between 1998 and 2004 was rebuilding and kept pace with Puntland, but once they became involved in fighting to rule Somalia they have backslid.