My read is that the main value prop is that they configure the WKWebView to not share any state cross-tabs. In the post they state that they've disabled DNS pre

My read is that the main value prop is that they configure the WKWebView to not share any state cross-tabs. In the post they state that they've disabled DNS prefetch, WebTransport and WebAuthn so obviously they're hardening beyond what ships in Safari (though some of this may already be covered by lockdown mode).