I'm ambivalent on whether it's better to have somebody disappear or have them lower the boom in person. I've been through both and they each leave questions unanswered.
I quit expecting people to hang around forever a long time ago and that's made such things easier for me, I suspect. I'm pleased they were around as long as they were and enjoy the memories of that. I try not to waste much time on wondering why they took off. I think it also helps me to appreciate those folks who insist on hanging around.