I think this is quite true. Even with federated/distributed architecture like web and email, many of the emails are on Google Apps (or whatever they call it the

I think this is quite true. Even with federated/distributed architecture like web and email, many of the emails are on Google Apps (or whatever they call it these days), Office 365, or a few other services. Many web sites are on WordPress.com, GitHub pages, or platforms like AWS or GCP.