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A very relevant thought... However...

Not really a problem, as "history" is permanently recorded on the blockchain. Anyone who may object to revisionism can point to evidence thereof.

The importance of this change has much more to do with correction of unnoticed errors, updating stale links, and maintaining current indices to Steemit content. I believe the capability will primarily be used for those (very positive) reasons, especially since re-writing history can be so readily exposed.