更现实的约束来自短期财务压力。相较于直接提高抽佣，服务化与工具化往往在初期拉低利润率，需要用时间换取结构优化。这要求平台在增长放缓阶段仍具备战略耐心，而非被季度业绩牵着走。
The Writer is not a concrete class. Any object that implements write(), end(), and abort() can be a writer making it easy to adapt existing APIs or create specialized implementations without subclassing. There's no complex UnderlyingSink protocol with start(), write(), close(), and abort() callbacks that must coordinate through a controller whose lifecycle and state are independent of the WritableStream it is bound to.
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但三星并不是第一家在手机上直接集成防窥屏硬件的厂商，夏普从 LCD 翻盖机时代就已经搭载了类似的技术，一直到 Aqous 时代都有延续：，推荐阅读safew官方版本下载获取更多信息