I need to see a source proving the Turn X even has these DG Cells then. Because it doesn't behave like it does at all, and no mention of it is made in Turn A from what I remember.
That aside I haven't the slightest what you're even trying to get at anymore. DG Cells aren't strong because they're not widespread? And yet them not being widespread because they're a horrifying weapon of mass destruction people wouldn't want to produce doesn't hold water because . . . the Turn X, which allegedly contains them, gets hurt? And that proves that it has limitations which disproves that people wouldn't want to mass produce it how?
I mean nukes have all kinds of limits but Turn A makes an enormous deal about them and why nobody should use them. Same with the Solar System and Colony lasers. I don't see how a weapon having a weakness stops it from being an amazingly evil weapon. How many failed colony drops and asteroid drops were there? It was still a super big deal every time.
I mean you can cite the Turn X all you want but that's not going to change what happened in G. As it is the Turn X and Turn A were both tucked away and forgotten in places similar to the nukes for the same reason, so if anything, the argument that "nobody wanted to see these things get used" continues to stand firm.
Turn X wasn't made in Turn A at all.
Turn A is made to combat Turn X, X is the original of the Turn suits.
Turn X having DG cells is one of the ways they've linked Turn A to G Gundam. Turn X found (looking NOTHING like what we know as Turn X) and then they created Turn A based on the Turn X because they we're afraid of X.
In the end Turn X and Turn A fought and Turn X lost (the large scare X across it's chest is a result of that fight and can NOT be repaired).
The DG Cells have the ability to self replicate and reproduce. The fact that Turn X contains DG Cells and can't heal it self shows that the DG Cells have limits and are not all powerful, it's very simple I'm not sure how you are getting lost with this. Beyond that, the very fact they can self replicate and reproduce yet they are unable to move past the Turn X means they have lost a significant portion of their power.
http://gundam.wikia.com/wiki/CONCEPT-X_6-1-2_Turn_X
Has the information on it's origin (which comes from the MG), Turn X was excavated during Turn A, but NOT created.
The DG Cells part of Turn X comes from one of the Turn A novels if I remember right. I will admit thought that I forgot but it is also speculated that Turn A also carries DG Cells, and can Repair itself and it's pilot, but it takes a long time and drains the A of most of it's energy (so even this is showing that DG Cells have a limit.)
I've never denied what happened at the end of G, or the fact that DG Cells are incredibly powerful. Only that they are proof that G is the most high tech series. The DG cells could have popped up anywhere at anytime but get locked away.
Nothing else from G outside of Trace System are high tech to a point any other series doesn't have something equal or greater than.