Part of it is that many of the new features are much more useful for 'web applications', as opposed to simple webpages. Whether or not grandparent finds such a

Part of it is that many of the new features are much more useful for 'web applications', as opposed to simple webpages. Whether or not grandparent finds such applications useful or that they are worth the increased browser complexity, it seems clear from usage statistics (e.g. of Google's suite) that many people do.