Is Time Skipping Impossible?

A lot of physicists think time travel is impossible or time skipping is impossible. Is that really true though? There are a couple possible wrinkles like obviously you can skip forward in time without breaking causality. You could cook something up like Jorge goes into a black hole like thing where you imagine he's no longer really part of the universe and that black hole evaporates in a thousand years. And so maybe technically you could imagine that's not really part of our universe anymore.