Since it seems as though you have some sort of axe to grind with the Zcash developers you might want to get your facts straight.
First of all, they have never said that “Zcash would only be CPU minable” Why Equihash? - Electric Coin Company you can see in that blog post the entire goal of Equihash was to be resistant to “custom hardware” ie: ASIC’s.
Many on the forums (including me) interpreted the Equihash algo as leveling the playing field between CPU and GPU to a low factor of 2-4x which did not turn out to be the case because of advancements in GPU power that took place after the paper was written. But to be fair to the Equihash guys, a good CPU can still do about 30Sols/s vs 280(?) for a high end GPU (which is only a difference of about 9-10x) it is alot more lopsided with other algos (like 1000x for SHA-256) on different coins, and to this day is still ASIC resistant which was the entire goal in the first place.
As far as ASIC’s being developed by anyone I would strongly advise sombody thinking of investing in such a hardware implementation to think again. The Zcash team has said they will likely change the algorithm if specialized hardware becomes a threat to decentralization and already have a Github issue pertaining to such. Plan how to change the proof-of-work · Issue #1211 · zcash/zcash · GitHub