Apple is choosing to only support a few cryptocurrencies and hasn't given any criteria for their choices. This is all people want, Apple--reasoning! The sting from incidences like these, at least for me, comes mostly from the information scarcity that proceeds them.
Unfortunately, it seems, the writing truly was on the wall once Dash had to be removed from Jaxx Wallet.
I'm not even a Dash user, but choice in such a new space is important.