Updating product line or need to amend something? No problem. Allow to add new content. Insert a link to the new version or a notice at any time. Just never

Updating product line or need to amend something? No problem. Allow to add new content. Insert a link to the new version or a notice at any time. Just never allow to edit existing content beyond a few typos. Updating product line and want to keep reviews? Sorry it's dishonest even if seller thinks of itself as "legitimate". I don't think in the end any legitimate seller is hurt.