Spot on! The stages of grief have profoundly shaped the way we understand loss of any kind. The only thing that should be noted is research has shown it doesn't progress in a stepwise fashion (KR has taken this information and largely updated how her model flows bc of this). To your point, people can get stuck in anyone of the grief reactions. Then you get complex bereavement. You're more likely to get complex bereavement when there's a lack of healthy coping mechanisms, lack of support, poorly managed mental health, ongoing trauma or loss, food and financial insecurity.