In jEdit, separate windows are called “Views”.
When creating a new view, all tabs in the current window are replicated to the new one.
For those with multiple monitors, this (at least IMHO) is far better than splitting a single screen.
I’ve found even when creating a new window, I can’t drag a tab from one to the other, much less have the same tab in two windows.
Being reduced to one screen seems less productive. Any way to replicate this behavior in Atom?