Suffers from my biggest complaint about modern JS applications as well: The assumption that the server is infallible. The progress bar simply never goes away a

Suffers from my biggest complaint about modern JS applications as well: The assumption that the server is infallible. The progress bar simply never goes away and my console is full of 503's. I sat waiting for like 30-40 seconds before I decided to check. Give me an error message so I know something went wrong at the very least!