最直观的是营销成本失控。完美日记的增长高度依赖营销投放，营销费用率常年居高不下，甚至一度超过 60%。随着小红书、抖音等平台流量成本逐年攀升，获客成本成倍上涨，烧钱换增长的模式在资本退潮、市场冷静的背景下，失去了可持续性。
Single layers beat two layers at equivalent parameter budgets (for trained models)
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tool as an aid, not a replacement for the developer's knowledge.
This put me in mind of a recent New Yorker article by the anthropologist Manvir Singh. The article is about the efforts of linguists and folklorists to reconstruct the Proto-Indo-European mythology which links folk tales and gods from India to Ireland. The serpent-slaying storm god, the Sky Father, the Divine Twins: these figures mutated and multiplied across cultures but retained their essential forms.