What is the psychology of people who don't reply to information for a long time?

First, I may not have read the information.

Now people's attention to WeChat has dropped significantly.

Second, the worst result is intentional alienation.

Or I don't want to contact you too much.

Maybe it's because you know or don't know,

Bring him harm or unhappiness.

Third, I am busy with work, or I am dealing with something.

It's not convenient to reply to messages at the moment.

Personal opinion, for reference only.