>>12127728Planck length/time are 99% meme 1% real physics. They're ultimately just natural units. Since they incorporate the speed of light, planck's constant, and the gravitational constant, the Planck length also provides a rough order of magnitude estimate of where quantum gravity effects become significant. Anything you hear about them being a "smallest possible length/time" is 99% meme 1% real physics. It doesn't imply discretization of spacetime, and the common quote that, measuring something that small would make a black hole, is over-extrapolation beyond the known limits of a theory.
