Being real-time is also chat’s greatest weakness. You can set aside a time to batch-reply to emails or check social media, but chat requires a certain generic availability in order to be useful. Chats or text messages, which have become pretty much indistinguishable, have the potential to intrude on whatever else you’re doing, especially on a mobile device. But this isn’t the first time we’ve faced technological interruption: once again, we can draw insight from the early days of landline telephone use. Before the phone, letters only arrived at designated times of the day, and no one knew if
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