Junk ideas are useful to document too. When the idea resurfaces, one can read why it did not get through the first time. A ticket-system like JIRA is the same

Junk ideas are useful to document too. When the idea resurfaces, one can read why it did not get through the first time. A ticket-system like JIRA is the same as an e-mailclient to me. You sort by activity, having the most active tickets on top. You can flag/mark them, you can put them in different boxes or just use tags,... All are just means to create order in chaos. But I would never think to move my old e-mail to a different 'system' than my normal e-mail(client). I never think of old e-mails or drafts as something I need to clean up.