In what situations would you use "has died" instead of "is dead"?
Here's what I think
Usually when a person pass away, you would say "s/he is dead" instead of "s/he has died". The latter sounds like you're glad that it's over or you've been waiting for the day.
In the following situation, I might use 'has died'
The device has been working unreliably for the past few months and today, it stopped working totally. I might say, "It has [finally] died".
Thanks in advance!