I'd vote for it if it were open and know former Bugzilla users at the organization where I'm using JIRA that I think would vote for it.
I know that this has been rejected twice now, but no reason was given at either time. I'd be curious to know why. Is it too much work? Is it thought that there is insufficient demand to justify the work? Is it thought that the approach is wrong and that Permalinks are superior? Is it thought not to be useful?
As a truly low cost alternative, I'd be in favor of simply attaching a counter to the identification line of a comment. For example,
Instead of: "Alan Meyer added a comment - 27/Mar/14 11:45pm"
Have:"Alan Meyer added comment_4- 27/Mar/14 11:45pm"
The only cost is adding the comment counter "_4".
The value of this is that a user could easily type "See comment_4-" in a reference to another comment and another user could use his browser's search feature (Ctrl-F) to quickly find it. I suggest "_4-" rather than "_4" so as to not have to deal with finding _4, _40, _41, _401, etc. However, a user could easily learn to search for "_4
" (space between '4' and '' if needed.
If software may exist that depends on the existing string, add something separate before or after or on a different line, perhaps "cmt(4) or any other unique ID counter string.
The comment number would just indicate that this is the fourth comment entered chronologically. If a site or user sorts comments differently, that's no big deal. A reference to, and search for, "comment_4-" or "cmt(4)" still works fine and is still semantically meaningful.