One situation where we made the decision to go against this advice was prefixing a type to our identifiers. This was only useful for humans to be able to distinguish the id types from each other so they wouldn't make mistakes when querying our service (passing a Foo id instead of a Bar id) since the id formats were otherwise identical.

We also made the decision that the geographical cluster doing the processing would be embedded in the id. This may have been a mistake, we never got to the point where it caused problems but if there was a major reorganization then yeah could have been problematic.