I just noticed a little thing regarding the timestamps below a question's title.
When a question is posted mere moments ago, it shows as "today":
(This screenshot was made seconds after posting this question)
I get that for SO main, that's not a big deal. On Meta, however, I often look for when a question is posted.
I'd love to see a more fine-grained readable format there, at least when the timestamp is less than 24 hours ago.