トピックは閉じられるべきではありません

[Moin]

You can always flag a topic, then a moderator can open it again.

@dax

Here on Meta we do not leave open solved topics, but we have adopted a very simple system, that many users adopt, they flag to contact the moderators asking that the topic X be reopened because they want to add / modify / ask something. This system works very well for us.