Oh, whoops! Yeah, I must’ve seen previews of comments hundreds of times, yet forgot they existed while writing the above comment. (I had these feature ideas while getting to sleep, and it seems I did not take a moment to re-evaluate them when I woke up...)
2.) Should already be the case. Linking to comments causes previews to show when hovering the link. (example)
Oh, whoops! Yeah, I must’ve seen previews of comments hundreds of times, yet forgot they existed while writing the above comment. (I had these feature ideas while getting to sleep, and it seems I did not take a moment to re-evaluate them when I woke up...)