I'm already/would prefer to deposit in subject repository

Applaud this! That's great, but there is also a value to the institution to have a copy of the work in an institutional repository. Mediated deposit – can we get updates from subject repository - we need greater interoperability here.

Another way of discovering research e.g. overseers students use repository to assess institution. Single national repositories are more vulnerable – universities are more stable.

There has been some work on the way forward for interoperability: