> Plank units are not physical limits on reality itself We don't actually know that. They might be. Planck units are what happens when GR meets QM and we jus

> Plank units are not physical limits on reality itself We don't actually know that. They might be. Planck units are what happens when GR meets QM and we just don't know yet what happens there. But as a heuristic, they probably put pretty good bounds on what we can reasonably expect to be technologically achievable before humans go extinct.