An edit button should only be allowed if it removed all Likes/Retweets/Comments a tweet had. And at that point, what's the point

I wouldn't mind if editing was only available for maybe 5 minutes or something. I pretty much only delete/rewrite to fix typos.

Jack has discussed this. It won't happen. Even in 5 minutes a tweet can reach MANY people, and then it would be able to be changed entirely?

Twitter won't get an edit feature, it just doesn't work for the platform. The only way I see it happening is as an 'undo' send feature like Gmail has. You can see the tweet for 15 seconds before it actually goes out. This has also been discussed as an issue since Twitter is supposed to be real-time, but maybe certain people wouldn't care and enable the feature

It would be a valuable experience for you and the health of Twitter, though.

Could you elaborate?

Your retweet behavior would change, Twitter would move past "no edit button" and iterate using the new data points