Should support be provided for ephemeral comments?
7147
Allow for setting comments to "auto-expire", to become "temporary comments"
40120
Are comments discouraged in a BibTeX file?
138722
The system sees a comment that doesn't exist
101219
Allow comments for all users; create comments review queue
48377
Commenting out specific environments
22721
Is there a syntax for single-line comments for notebooks?
5021
When to comment or answer
97539
Etiquette for revision comments
18647
Commenting out large sections
117715
Always allow commenting on posts I have previously commented, irrespective of current rep
129908
Allow flagging own comments
147193
Should the site prompt new users to include an @name in comments?
51469
Allow converting comments to answers
1888
Best way to obtain clarifying information when reputation doesn't allow comments?
128175
Could the favourites mechanism be extended to include comments?
78459
Comment promoted to answer
68981
Improve the usability/intuitiveness of direct comment links