You can reply to your own post (but it won’t show up in your notes)
You can only reply to the original posts – not reblogs.
If you have xKit’s One Click Reply-extension and Classic Notification-extension you’ll be able to reply to replies by clicking as it shows up on your dash (if no Classic Notification, you can reach it by going to your notes-widget).
Since your replies to yourself won’t show up in notes you can’t reply to your self-replies this way.
You got 3 choices as for who can reply to your posts:
Ppl you follow + ppl who’s been following you for 1 week+
Ppl you follow
You can’t turn off replies completely
Reblogs with comments and replies alike show up in little speech bubbles in notes if you click on a post’s notes. (The notes got a new look in general too it seem.)
You can only reply to ppl who already got the update.
Replies can’t be deleted.
Holding in Shift while you click Enter/Return will let you make line breaks while replying to a post, clicking Enter/Return without Shift on the other hand sends your Reply.
Letter count seem to be 475.
I think that’s not entirely true about not being able to reply to reblogs? Because I was able to reply to a post that someone had made and then reblogged – I replied to the reblogged post. So, maybe the reblogged post has to be that person’s original post for you to be able to reply, but if it’s someone else’s post, you can’t?