Ed Witten posted an interesting article on arXiv a few days ago on the fate of global symmetries in physics beyond the Standard Model. You can read it here. In particular, Witten argues that the global symmetries of the Standard Model are all approximate and emergent at low-energy, and they should be violated at the GUT and Planck scales. In particular, a quantum gravity theory should only contain conservation laws associated with gauged interactions. The arguments are likely familiar to experts, but I thought it was a nice and short self-contained lecture on the idea.