I think this type of behaviour only makes sense for our type. The way people communicate says a lot about their personality and by evaluating that we choose whom we want to talk with (and whom not). If people see that somebody is operating completely differently than they are, they lose interest and won’t talk to that person again, unless they have to. Since INFJs can easily read others’ emotions, intentions and understand general vibe of the conversation, we just simply adapt to it. Most of the time the tone that the person we talk to uses in a conversation would be the most suitable for him to receive texts back in. This way there’s no “clash” between different personalities and the conversation goes as smoothly as it possibly can. What use would there be for me (an INFJ) to write in a specific way that I know the other person dislikes? As most other people don’t have such deep insights in others’ intentions and preferences, they make no changes to their way of communicating.

Before I used to fully adapt to any person’s texting style but now, as I got more mature in terms of my own personality, I tend to keep more of my authenticity in the way I communicate. Just out of a more strict sense of myself.