Seriously people underestimate the ludicrous energies involved in near-c travel. Even with engines off at those speeds the interstellar dust undergoing nuclear fusion off your hull will give you away
Counterpoint: biology is a machine in itself.
Our machines of metal and microchips are incredibly primitive compared to where they'll be in 100, 500, 1000, 10K+ years from now - and when a machine has the ability to to self-replicate, have autonomy, and to protect itself from microscopic threats, then it sure looks a lot like life-as-we-know it.
That's a massive difference from 0.99c travel
Humans as we know them today will never visit other galaxies, but our AI descendants almost certainly will.
Right, they could have ridden dragon-unicorn hybrids through a magic portal made from the dust of black hole centers.
That's what you mean when you say "literally everything is on the table."
Or, start drawing lines for me if you disagree.