NOTE: may be inaccurate. Feel free to photoshop your variants.
this post was submitted on 05 Nov 2023
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Why is a bright future assumed?
Sun eventually goes supernova.
It doesn't. It's not massive enough. It turns into a red giant, then collapses into a white dwarf and eventually fusion basically stops.
Yeah that's totally not a worse death.
Realistically speaking, any of the major changes that happen near the end of a star's life will make their planets uninhabitable on a time scale that seems pretty long from a human perspective. Imagine the last 100 years of climate change, but it just keeps getting worse at the same pace for a million years. By the time a star swells into a giant or explodes in a supernova, there won't be anyone around to notice.