It's strange to me that this would be news to anyone. That said, as someone who has had so many wild experiences all alone, I eventually had the epiphany that none of it matters if you have noone to share it with.
At the end of the universe, there is a café with the last known entities that persist. They exchange stories, favorite experiences and say their goodbyes to one another, ancient and forgotten.
There's a dreaded moment when straws are drawn or a volunteer is called to be the last one to turn off the lights -- to herald the calling of the next universe.
No one wants to do it however, because the last one has to do it alone.
It's in that quiet abyss, in the consuming darkness, the expanse and contracted void of dead light, where stars no longer shine, where trillions of lives existed and were extinguished -- that an epiphany can be had, as one celestial appendage holds over the reset toggle:
Everything matters. Even if no one is around to experience it.