On Confluence, it's easy to start a page, and, later, decide not to create it. However, only closing the draft won't discard it. Users need to manually access the draft, and then click on the three ellipses > Delete unpublished page. 

Although there is no limitation on the amount of created pages, this can lead to undesired content being kept, which can affect exports.

A solution would be the possibility to set a reminder for drafts that aren't touched for more than 15 days, so users could evaluate if the draft was still required.