For GMail I often used "non-folder tags" for example I would tag emails based on the to address and they were clearly marked in my inbox. Or I would tag certian

For GMail I often used "non-folder tags" for example I would tag emails based on the to address and they were clearly marked in my inbox. Or I would tag certian types of emails so that I can review them later. For example SMS would be tagged, but I would read them in my inbox. I just really wish GMail archiving was a tag. For example I get my video subscriptions into a tag called "Videos" but when I am done I remove the tag and that info was lost. It would be nice if Archiving was just adding an "Archived" tag and it was excluded from tag views by default. That way archiving doesn't forget all the tags. The only workaround I am aware of is making two tags for everything like Videos and Videos-Archive. Apply both in filters then just remove one once you are "done" with them. Folders have the same problem. Of course trash systems work around this by explicitly recording the original location.