I think is too early for SN. Let it grow a bit more. Don't rush it too much. I think we are still in the stage of creating a strong curated community and testing a lot of features.

OP @elvismercury is right about being able to edit long posts. I myself sometimes I made mistakes and/or forgot to insert a paragraph, or want to simply add something more. In general I agree with all he says in this post.

Now that you ask me directly what features I wish to see, (but please, don't put extra effort on this right now, SN is OK in this phase) I will mention some:

1. Maybe adding an extra cost with sats for later edit. I don't mind to pay extra for my own mistakes. That will make long form posts, more curated.
2. Add option to "read more" with a small paywall fee, for those content creators (eg. @jimmysong could easily post his paid newsletters like that on SN) that want to use a specific fee for their content. But for this must be a required section of TLDR or introduction for the article, so abusers/spammers cannot take advantage or readers.
3. In order to have a more curated "feed" of posts/articles, writers must have their own sub like "stacker.news/s/darthcoin" for others to find it easily. Or convert user bio page into a "stackpage" listing all his main posts/articles and the bio could be a separated section. Something like substack have.
4. Option to export all your articles into a zip file, for backup purposes. Or even maybe a full import from substack of other articles. The markdown formatting on SN is OK, easy to use for many writers, I don't think it needs something else.

Maybe other more professional writers could say more, I am just an amateur, I don't know why you asked me about this 😂😂. Yes I write a lot on SN, that true. Maybe I should slow it down a bit.