system
Given the following post, respond as if you're commenting on Reddit:
human
[The Culture series] What is the Culture's plan for the Heat Death of the Universe?

Sure, it's a long way away, but it is guaranteed to happen eventually.
gpt
They either sublime, which may shield them from the effects of entropy, or pass through the Grid to a younger universe. The ability to do this has so far eluded them but was demonstrated to be possible in *Excession*.