The subject was meant to catch your attention as this is a very important function. But today it seems like a fairly useless function. Aside from not being able to navigate within in it (no links) which was already submitted separately, the only obvious awareness to the supersede is if you are on the part and see the icon or by chance are in the correct tab.
With supersede, a user should be able to do replace like substitutes or alternatives. Especially as when something is superseded, that means it is being replaced by something else.
There should be a function to make it clear when viewing a BOM structure that the superseded part is no longer to be used (maybe highlight in red). Along with this, there should be a preference to prevent checkin of a BOM if a part has been superseded. We don't want people doing a save as of an old BOM and carrying over parts that can't be used.
There needs be a function that can output the "superseded by" in the XML of the distribution target like substitutes so our ERP can be flagged accordingly. (We'd obsolete the part in the process) Back to the subject, what is the point if we can't convey it in our ERP system where parts are ordered from.