This is a really hard call. My parents moved to a different district at about that time, and it quite beneficial overall for me. But, I wasn't really leaving many friends behind, so that was less of a question.

As an adult, I somewhat accidentally ended up moving step-kids (a bit older), and I deeply regret it. They had far better educational/career opportunities in the new place, but I think they probably would have ended up happier hanging out with their goofball/stoner friends for a few more years.