The other key point is regarding the fear that many people have for “annihilation” by attaining Nibbana.
Conventionally, we say that an Arahant is not reborn after death. That sounds scary for many: “Why do I want to be annihilated?”.
– But the point is that there was no “enduring entity” to be annihilated!
Think about it this way: Suppose your name is John in this life. You die and are reborn a deva. Then you live that life and reborn an animal, etc.
– When you are a deva , you are not John. When you are born an animal, you are not that John either.
Furthermore, that John will be born many more times in the four lower realms than in human or higher realms. Thus that “lifestream” is subjected to much suffering than pleasures in the long run; see, “What Reincarnates? – Concept of a Lifestream“.
The best way to look at this is to say ANY AND ALL future suffering will be stopped at the death of an Arahant. Of course, MOST future suffering would be stopped after the Sotapanna stage.