@timbray It’s certainly the most important unsolved problem in physics. MOND is a durable and remarkably successful model but it’s empirical. LCDM folks (the mainstream church) largely regard it as heretical. This news is interesting as it seems that JWST has blown a massive hole in LCDM orthodoxy, and thus the Standard Model of Cosmology which is also an empirical fit. So both are likely wrong and solving this problem will result in a paradigm shift.