My understanding is ShadowCash would not be affected by this since a) SDC is a descendant of BTC and b) NOT a cryptonote coin.
I was talking about pure Shadow (Shadow <> Shadow). Shadow is not a Bitcoin clone (allow me be nitpicky - this is not "being Cryptonote" that matters, this is "not being Bitcoin" - NXT, Ripples, Ethereum... have the same issues)
Pure Shadow may be as good as Monero but also has the same ecosystem issue. And this has nothing do with CryptoNote.
I hope I helped.