Rebound- your experience

What is your experience with FA ex who rebound right away? I understand that it’s a way to avoid thinking about what did not work out. But are these new relationships successful and/or more meaningful. PS: I have no interest in going back to my ex, so mine is not an hopeful projection. We have been NC for months after he told me had started a relationship with a much younger coworker. I am just trying to understand better. Thanks!