Re: When it's important enough to die...
In the time I've been playing/running my campaign (almost 25 years), I have had exactly 1 permanent PC death. It wasn't planned. It just happened. But the manner in which the character died, it was deemed by the group at that time that it was in the best interest of the game that the character remain dead as an inspiration to the rest of the group.
In the time I've been running my campaign, I have had exactly 1 permanent main villain fatality. That situation occured "off screen", rather blatantly, which tied into a plot that the player group was involved in. The group's collective inaction in events led to that death. Being a villain, they weren't too heartbroken about it, but the fact that it was done by a "hero" sliding down the slippery slope of sanity, had an impact on that group.