Thanks, that's exactly the through line I was hoping would land. The thing that ties those first two together is that they both survive code review, which is about the worst property a bug can have. The compiler stays quiet, the endpoint looks right, and the only place the truth ever shows up is the bill. On SSE versus SignalR, the piece I'd add is that the proxy is really the other half of that call. Even when you only need one direction, if your edge buffers the stream and won't let you switch it off, SignalR quietly wins. Glad it was useful.