I’m no writer but by the time I finished reading your story I was thinking you ought to write a fuller version of it.
Flesh out this galaxy-exploring civilization.
Coincidence? I . don’t . THINK . so! lol
I have another idea that just popped in my head.
Two people in an argument, an argument that is never resolved.
At the end of the short story, you discover that they are two AI computers.... which is all that remains of mankind... and they are locked in a perpetual, unresolvable argument.