Earlier quoted context omitted.
How is it trivial to solve? They either need to prevent sellers from modifying product pages (which would be a disaster because any mistakes could no longer be fixed without losing all reviews) or gate it behind human intervention(slow) /algorithm (complex). There's nothing trivial about the issue.
Couple of fairly simple things they could do to at least help somewhat: * Put reviews for current listing at the top of the reviews (currently default sort seems to be a vague "Top reviews", but can be changed to "most recent" which presumably accomplishes this. Vast majority never change defaults though) * Clearly mark any review that is for a previous version of the listing, and provide a link to view the listing a…
Thing is that they don't really care.
Mostly what they care about is handling returns which is what costs them money so they're targeting items with high return rates, and that's it.
They don't actually care about you getting scammed if they get their cut and don't have a lot of overhead.
All of this brainstorming is meaningless when the economic incentives of the company aren't aligned with the consumer.