We certainly can "zip" enough knowledge and technology to match Earth as it was in year 1000 (and almost certainly year 1900) and as experience shows, it's suff

We certainly can "zip" enough knowledge and technology to match Earth as it was in year 1000 (and almost certainly year 1900) and as experience shows, it's sufficient to build up in a millenium or two i.e. very tiny amount of time on that scale.