This is a great post, it is well written and brings up some important points. Thanks for mentioning the elephant in the privacy coin room. I like your vision for a PHUSION of privacy coin features, thinking about interoperability and security. Changes could lead to new unpredictable vulnerabilities, but this would be better than the "there can be only one" attitude of maximalists. I would like to live in the future where all the coins succeed and we have lots of choices. Privacy should be at the top of the list of choices, and I am still pondering the "privacy by default" thesis. Thanks for bringing up these great questions, I will ponder some more as this is an ongoing conversation.