Stephen

Yes, but not a traditional one. Many second brain systems are built around a long-form note unit; you write or clip a paragraph or more of text and then link it to other notes. Essentially you are building a personal wiki for yourself. That can be useful, especially if you are a content creator whose job is to output lots of writing. I'm a knowledge worker; I need a second brain to help me...

Not yet, but in time it, or another large language model like it, will become the dominant internet front end, replacing web browsers. IMHO.

It's a real struggle for sure, but I found it easier after switching to SwitUI.

I have chosen to build for the apple ecosystem using Swift. The users I have seem to appreciate that the app is the same across iPhone, iPad, and macOS, plus iCloud file sinking makes working across devices easy for them, with no back-end cost for me. I do get Android/Windows requests, but for now, I'm focused on finding my MVP and a marketing message that works.