@Orange41324306 True for original muon, but not quite for muon family. You could modify the abc factors or add a diagonal eps to the preconditioner in order to filter out the small eigenvalues which are typically considered noise, which would make muon work for noisy gradients such as RL.
NIPS reviewers: IMO, the only acceptable scenario where you don't update your reviews after the author responses is if the authors did not upload a response. If they addressed your review, they deserve some feedback.