There are very few unique source codebases which implement privacy coins, maybe a half dozen depending on how lenient you are (i.e. is DASH a privacy coin? Barely, but it could be considered one. Blockchain analysis companies make fun of the "privacy" of DASH.)
I believe when he says "inventing a whole new field" he means inventing a whole new field of attacks and defenses, just like the Phrack paper invented a whole new industry of attacks and then their defenses.
Taking these new kinds of attacks into account, all existing privacy coins are vulnerable. Monero is more vulnerable than Zcash Protocol, since it does not have Zero Knowledge Math. It uses Group Theory, which leaks metadata like crazy.
So why would one pick Hush over other coins like Zcash? Because of less metadata leakage?
What I am trying to get at is, what value does Hush have in the real world? It's a privacy coin cool, but how can it be adopted/used by institutions etc. And if the tech is so great why is no one using it right now?
