Would it be feasible to have the OP highlighted in comments and answers?
11152
Make comments from original poster stand out. Use different background color
38307
Does the OP of a question get a message in the inbox when I update my answer?
50407
Can I draw attention to a well deserving answer on my question?
37138
Can we make new flag responses more visible?
51469
Allow converting comments to answers
82959
Can we have threaded comments?
52100
Allow new users to flag comments on their own posts
122243
When to answer vs when to just comment
108648
Can I "tip" someone who left a good comment on my answer?
18726
Receive Notifications for Comments on any Answers to Your Question
95252
Could new users see a notification in the space where the add comment button would be, like "you need a minimum of X reputation to comment"?
76924
Should we be allowed to edit comments?
108460
Review first post / late answers: show other answers as well
5563
Asking users to accept answer when they comment that it answers their question
7611
How could I notify Stack Overflow's expert users about my new question?
154006
Allow linking (suggested) edits to one comment
102331
Can we show new/anonymous users more Q&A?