Here POV of the man and engineer:

* Design looks amazing!

* Technically it's not an app. It's a web page. It gives me a an insecurity feeling that my data will be lost on a refresh.

POV of the guy who is building "privacy-first" app: Feels like you fell in love with your solution. Ask your wife to talk to her friends if they care about privacy? Watch a first time user uses your app.

IMHO privacy is a real concern for a fringe minority of the users. You and me are among those. What you just did - is verified that Mr. Market does not care.

When I asked my wife about privacy, she was like "what???".

Couple books that helped shape my view on this: "Fall in love with a problem, not a solution" and "Mom's Test".