A tag that isn't reachable from head is just a tag that isn't
reachable from head. Its very valuable; it shows something the user
chose to tag. Discarding that data and losing it forever is very
unfriendly, and there is not particular reason that copying them
around should be expensive.
A tag that isn't reachable from head is just a tag that isn't
reachable from head. Its very valuable; it shows something the user
chose to tag. Discarding that data and losing it forever is very
unfriendly, and there is not particular reason that copying them
around should be expensive.