When I have tagged a Private Message, it doesn’t appear in the /tag/mytagname topic list.
This leads to a risk of missing an important piece of info, and means that I have to search the tag twice.
I’d love to be able to have all topics (regardless of PM or not) in the Tag list. Or at least having an option to include them for staff.
This might be much more pertinent once Chat is rolled out a bit more and PMs become more like PTs!