I thought the early promise was just to eliminate double spends and eliminate the need to trust a third party, in which case that early promise was already fulfilled by Bitcoin itself. Only a small minority of users demand the kind of privacy that Zcash and others promise. That promise hasn't actually been delivered yet, since we haven't really had people attempting to break them. If the FBi and Interpol try, and give up, then we can say that promise is fulfilled.
I fully agree with your words, but today it lacks innovations and of this even though it has enough quality to keep itself among the big ones, a formidable and honest project.
Correct. It hasn't done enough to differentiate or convince adoption, but we should give it time. I'm still on Monero though.