3 major resons that will not happen.Hope this helps, I'm sure some other Sky Q users on here might have a better understanding of this than me, if not right now then maybe in a few years time when we start to see their HDD's failing and Sky tell them they are about to lose all their recordings. Who knows, by this time Sky might finally agree to allow their Sky Q boxes to transfer recordings by their engineers so this then becomes a mute point. We can only hope.
1 Copyright law and rights issues. - Copyright law only allows recording of virtually all broadcast material (FTA and subscription) for time-shifting purposes only (for a reasonable time) and NOT archiving material. Most brodcasters purchase rights to allow customers for a certain length of time and after that ends other broadcasters can purchase said materil. Fot this reason Sky will not allow such archives being transferred to a new box. Remember your subscriptions (apart from buy and keep) merely entitle you to view it (recordings should be viewed in a reasonable time (not yet legally defined) and you do not pay to archive it in a personal collection
2 Secondly they are only engineers in Sky's job title - they are installers without any professinal engineering qualification requirement.
3 Time constraints for the installers - how long does it take to remove drives, clone drive and refit drive then install and setup new box? Too long even without any problems. Do you really think Sky will pay for that sort of time??