The early universe at redshift z>7 was an arena of rampant growth: black holes with masses up to a billion solar masses already blazed as quasars, devouring gas at monstrous rates. How these giants managed to grow in such a short time is one of astrophysics' sharpest puzzles. Among the candidates for savior is fuzzy dark matter (FDM), a hypothetical form of matter made of ultra-light axions. Its wave nature manifests on galactic scales: in the centers of galaxies, solitonic cores are woven from interference waves — gravitational funnels that, as dreamed, could accelerate a black hole's feast hundreds of times.

New numerical simulations dispelled this illusion. Imagine a black hole as a wanderer trudging through fog. But the fog is no ordinary one: it's woven from quantum waves, breathing interference and never still. The solitonic core is not a solid rock but a trembling mirage. In this shaky dance, light seeds (10⁶ M☉) get flung out of the dense center — accretion cuts off. Heavy ones (10⁸ M☉) greedily gulp gas and then go hungry. Only middleweights around ~10⁷ M☉ stay in the soliton's corona, steadily absorbing matter with a boost factor up to 100. But even they need cold gas and a continuous inflow.

Thus fuzzy dark matter loses its status as a universal accelerator. The problem of early quasars isn't solved by potential depth alone — fine-tuning of initial masses and gas flows is needed. This forces a revision of models and brings other scenarios back into play: heavy seed holes from primordial perturbations, mergers, collapsars. Remarkably, even for a perfectly balanced hole, growth depends on the soliton's oscillation phase — a lucky "gulp" might last only thousands of years. Future simulations that incorporate active galactic nucleus radiation and cosmological inflows will help reconstruct the giants' true history. And the keen eye of the James Webb Space Telescope may already be catching glimmers of those distant dramas.