How do we stop Trac’s Future Release…

How do we stop Trac’s “Future Release” milestone becoming a graveyard?

Or, what should we use the Future Release milestone for?

The issue is that we get tickets with good ideas or, in some cases, small bugs (or big bugs that we know will take several releases to resolve) that don’t fit into the current release roadmap, the ticket is moved to Future Release. These tickets almost always rot there unless a contributor does some work on a change, and we move the ticket back to into a release.

Over time, this builds up and currently we have 439 tickets in there.

Interested in any ideas because the way we’re doing it now just doesn’t scale.