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

Letter to Arc members 2025

On Arc, its future, and the arrival of AI browsers — a moment to answer the largest questions you've asked us this past year.

Keeping Tabs by The Browser Company
@nicklockwood It read to me like they're just rebranding what they formerly called "ArcCore" (their Obj-C++ wrapper around Chromium/WebKit) to "ADK" and what they dumped was the SwiftUI/TCA frontend built on top of that but either way it seems weird 🤷‍♂️