Requires experience of admin dashboards or GUIs

Not needed yet, however important

Requires software development experience

Requires knowledge of unwritten arbitrary choices made by specific people, AKA "historical reasons"

Important to resolve eventually

Useful but not important, at least currently

Requires a broad knowledge of the whole system

A server outage which needs to be dealt with immediately

Requires experience of the Unix shell and/or sys-admin

Needed urgently, if it is done at all