会话应用看似人人都能采用，但“人人”并不相同。视障使用者依赖屏幕朗读，听障参与者依赖视觉提醒，行动不便者难以快速点击，跨语言用户可能因表述障碍被排除。无障碍不宜是插件，而应发展为会话产品的基础。 包容性安排要允许组合字幕。语音能够转文

社交电商把交易放进同一个环境，对话应用则进一步把购物变成连续对话。海外用户不再只浏览静态页面，而会询问“多久能送到”。这种互动能够压低信息搜索成本，也让品牌从一次曝光进入更长的决策过程。 好的智能导购首先应该比较，而不是急着发送购买链

The development of modern messaging begins long before mobile apps. In the 1950s, computers were massive, expensive, and difficult to operate. Work was usually handled through delayed computation. People prepared punched cards, submitted jobs and commands, and waited for a report to return finish