[kristiandupont]

Even setting aside the UX issues in this, I think this is underestimating the complexity. I don't know anything about Twitters infrastructure but obviously we are not talking about a single postgres instance here. Effectively turning every tweet into a linked list with connected retweets, likes etc. is a significant data model change for a system of this scale.

[reidjs]

For now let's just add a "*" to the original post to give all the retweeters deniability. I'd bet 99% of edits are for grammar/spelling/readability.