> The silent failure modes everywhere gets really frustrating.

I literally just experienced this with RCS failing to activate. No failure message, dug into logs, says userinteractionrequired. Front page of HN, nobody knows, apple corp response, 'thats interesting no you cant talk to engineering'.

Read the RCS spec definition document to fall asleep to after the board swap and the call saying they won't work on it since issue resolved, answers exactly what that meant, Apple never implemented handling for it, my followup post: https://wt.gd/working-rcs-messaging