In Jumanji (1995) Robin Williams' character is sucked into a board game as a kid in 1969, while his friend Sarah escapes. He lives in the game-world jungle for 26 years until two different kids bring him back in the overworld by rolling the die and continuing the first turn. They unleash all sorts of jungle monstrosities and the only way to send them all back is to finish the game. In the end Robin Williams wins the game and he and his girlfriend are sent back to 1969 and are able to live a normal life. 26 years later, they reunite with the two kids at a Christmas party, who are now the same age as they were during the game. They recognize them, but the kids don't recognize them back because from their point of view they have never met.
How did that situation feel like from the point of view of the kids? Not the ones at the Christmas party but the ones that were there when the game ended. Did they cease to exist, Thanos-style? Did they get sent back in time to before they even existed? They'd eventually be born again, but it wouldn't be them, it would be different kids with identical genes. Did they get left behind in a different timeline? In which case, there is a timeline in which Robin Williams' character and Sarah would remain dead/non-existent.