If every one of Walmart’s 2.1 million employees used an enterprise system every day, that system would be less than 1% the scale of Snapchat (250 million DAUs).
Internet scale and enterprise scale are completely different animals.
But Snapchat, as most web-scale companies, doesn't care whether a single operation gets lost and whether a small number of user have data loss. Whereas Walmart, at least, should care whether every single employee got his salary or whether the taxes for him were booked properly. Therefore a lot of "solutions" of so-called web-scale companies are to naive for an enterprise.
Internet scale and enterprise scale are completely different animals.