It feels like two issues here and I think that these are both touched upon.
The issue of sovereignty of ancient artefacts is not the key point but for many a sensitive subject. It is not a new topic. Invading armies, nations and civilisations have always taken items "home". For me the most essential element is that these artefacts remain public i.e. not in private collections. After that I feel that it is a discussion beyond the scope of this forum.
What I read as the main point of the editorial is that various data are becoming historical artefacts. Arguably this has always been the case. Great excitement has occurred when historians have discovered documentation detailing history in the form of engravings, papyrus, scrolls, manuscripts and books. Why should electronic data be any different? A large amount of care is taken causing significant expense for physical artefacts. Now institutions need to face up to the effort and associated cost for the equivalent attitude for digital artefacts.
-- Stop your grinnin' and drop your linen...they're everywhere!!!