Something doesn't quite add up in this post: https://browsercompany.substack.com/p/letter-to-arc-members-2025
So with Dia they "started fresh from an architecture perspective" instead of using the tech from Arc because TCA and SwiftUI were a barrier to performance
But they can't open source Arc because Dia uses the same "ADK" architecture, and that's their "secret sauce"?
If I was cynical I'd say either the "fresh start" is bullshit and Dia is just an Arc reskin, or that the ADK excuse is bullshit and they just don't want to share