The GZK cutoff is a limitation that cosmic rays have, there is error-correcting computer code in the fabric of reality and yes reality is pixelated and we're characters in a PlayStation 94 quantum console of the real future simulating its past. Quantum gravity has been discovered, game over. We are not real and figments of one another's imagination. There is no reality to lose touch with.
https://scitechdaily.com/is-space-pi...antum-gravity/
However, the multiverse is also being simulated and we are immortal cartoons due to quantum immortality. It's better to not be real and never really die. The existence of a quantum console in the real future is proof that we managed to not self-destruct and survive long enough as a civilization for it to come into existence. Good news.