So, if there isn't a solution to do something at scale, then the answer is to simply not do said something at scale. The defence that "this isn't technological

So, if there isn't a solution to do something at scale, then the answer is to simply not do said something at scale. The defence that "this isn't technologically possible" isn't at all a defence. The _most_ charitable interpretation would be that this is Amazon stress-testing how well they can handle co-mingling of various product lines... but that's still not great if they don't pull the experiment immediately after realizing they can't.