[metrokoi]

I believe you are misrepresenting the situation. No one expects corporations to archive and preserve all data, especially not data that they are not associated with.

However, if they create a monopoly on that data they have an obligation to preserve it, especially in the case of a corporation outright aquiring data instead of simply "out competing" for data. And as everyone mentions, of course they are in no way legally obligated to do so, but they are by any reasonable standard ethically obligated.

I do think that the government could and should archive data, but there is currently no system in place for doing so and likely will not be for a long time, if ever. Corporations would simply have to maintain the data that they already have.