Firstly, these are not newer rounds, you don't even know what you are blabbering about, the datasheet is from early 2000 when those rounds failed the QA test. These are not Mk2 rounds.
Second, what is the logic that a product from the 80s is obsolete? So M4s are obsolete or B-52? And as for inventory, as I have shown the 2014 order is of the size of 66000 rounds, for T-72 and T-90, which half of the fleet?
Here he detailed it beautifully
You don't even know the difference between Reddit posts and forums. And of you try to read they actually saying 680 mm. I mean wow.