Yes, but I experience meaning independently of those effects. I think that most people think those effects are what create the experience of meaning.

Boltzmann brains experience meaning too. Not that is does them any good in the way that it does for biological system.

It's not like we have a planet rich in meaning and then the sun swallows the earth and all that meaning retroactively disappears. It just exists in the past, not the future, and I think that is sufficient.

I always thought it was funny when people thought that the heat-death of the universe had moral implications. Like that killing someone means they never existed, or something.