The thing is, the February update made the chips unavailable. If they were "unobtainable" because the only means of obtaining them was temporarily unavailable, that's when they should have been declared "unobtainable."

Announcing that on the next update, when nothing has visibly changed about the ability to acquire them, is saying these items will not be available again. This is supported by the removal of Arch-Ultima/Arch-Omega drops from potpourri. There's no reason those items needed to be removed unless the content they came from is not returning. Sure, having them available for potpourri is a little redundant when you can just buy the gear they're used to make, but it wouldn't be the first time redundant means of getting an item were left in the game.

All signs are pointing to Limbus as we knew it being scrapped in its entirety to make room for the refreshed version, which is... really not great. It's saying that, no, the game prior to item level play really doesn't matter at all.

I'm glad I saw this coming and made time to dash out those RoE objectives before the Limbus shutdown; now I just wonder if those completions are going to be clawed back; either they become impossible for anyone to complete in the future, or they're taken away from players who already completed them, neither of these are good choices.