I think that one is often answered explicitly by product review sites, for popular brands and models, at least.

The comparison matrix is basically infinite in size when you want to compare last-gen vs newest-gen across several manufacturers, for example.

Yeah, but the number of people trying to make money from affiliate links is apparently near-infinite as well. A vs B product comparison is amazingly well covered. For the times I've searched for it at least. Reddit forums handle a good chunk of it.

Come to think of it, that might be why Google wants to make these kinds of things automatic and structured. Perhaps they think the shopper's experience could be streamlined and more likely to purchase if comparisons are more consistent.

OK. I assume there are questions that aren't answered explicitly by existing pages, where wrong answers don't get people killed. If there are no such questions, that's not my problem.