Interoperability is great, walled-garden integration is a trap like any sort of bundling. If someone wants to create a suite of products that work well together that's fine so long as they employ means that allow other products to integrate as well. Google has gone the other route and created a suite of products and services that integrate in ways that exclude competitors.
Yup, and that's what people want. So what is the integrated service you are saying exists that can be a drop in replacement for the way so many organizations use Google's integrated services?
There we go. So if we go back up to your first comment where you say there are separate replacements for some services, you can see that isn't really relevant since what is being discussed was a drop in replacement for Google, and not an individual service they offer.
Aside from that though, Google's offerings are not a walled garden.
