SOM missile is a million dollar missile. Trg300 is a fraction of the cost of SOM. trg230 is even cheaper. Why do you think Israeli’s are using it?!! (We may not like to produce trg series air launched version as there may not be enough cream to skim off of it)Let's not forget TRLG-122 as well, being smaller makes it lighter, but being able to launch them while airborne will save precious fuel that's consumed during launches.
TRLG (or TRG)-122 having a L2A range of 40 km could double that easily. Maybe even reach 120 km range with few modifications.
TRLG (or TRG)-230 has a bigger warhead so I understand the advantages of being able to launch it while airborne, but it doesn't have same crucial tech as SOM, so wouldn't that be a waste ?
The so called “ crucial tech“ is it’s stealth geometry and the special paint; plus the seeker head to have the topography picture of the terrain etc. This is to make it invisible to enemy defences as it hugs the terrain it is travelling at. SOM is a “Cruise Missile”. Trg300 air launched is a supersonic land attack rocket.
They both serve the same final outcome! Successful Destruction of target.
With the Aksungur and Akinci coming in to play, these rockets may be the right way to go forward in making them more lethal.