yo sick, just took an unexpected call on Nura while on a train, and everything just worked. I was running my feedbackd proxy haptics-please, so feedbackd made my phone buzz and played a ringtone. My music paused and my bluetooth earbuds' firmware notified me "You have an incoming call". The call audio went through the phone speakers and mic without issues.
All parts of the stack worked together on my FP5. It makes me trust it a lot more. Thanks to everyone working on this!