So what's the alternative? Being referred to an IM thread where there is still the long history but the discourse is full of short, impulsive messages written in haste? And you are expected to be instantly available to read the thread and respond? Email is better set up for thoughtful, async communication and finding thread by "subject".
What the article doesn't state but implies is when someone sends you an email thread, it should be a standalone message that clarifies the state of things and the ask. And if the reader needs the context of how something got there, they can refer to the thread history.
What the article doesn't state but implies is when someone sends you an email thread, it should be a standalone message that clarifies the state of things and the ask. And if the reader needs the context of how something got there, they can refer to the thread history.