[deadwisdom]

The most compelling use-case for me is the web-api deprecation. It very clearly tells you when a service will no longer be available. Currently there are no standard mechanisms for this and are mostly driven by documentation. If an api used this then a consumer could look for these and raise alarm bells.

[wongarsu]

There are also plenty of services that host user content, but only for a short period of time. Pastebin entries with a set expiration could for example set this header to inform clients about the expiration date. That way software can detect links to content that will expire and act accordingly.

[deadwisdom]

Yes, and I think that's the smartness of this is they clearly came from a stance of Deprecation and realized they could make it more general. Good work, imo.

[sbergot]

That is the first thing I thought of. We had several case of partners API being deprecated and we were not notified in a timely manner. This could be used to trigger monitoring alerts.