Wait. You are the one saying a Tweet can be edited and that Twitter is a message board.
Are you confusing Twitter with something else?
In my last comment, I only asked the following question.
What is Twitter then?
If Twitter is not a message board, then what is it?
You may refuse to answer the question, if you like. I can look up the vague and generalizing description of Twitter instead: the kind of description all too common coming out of academia, business and politics during recent years.
Twitter
Wikipedia
https://en.wikipedia.org/wiki/Twitter
“Twitter...is an online news and social networking service...”
That’s very clever. Bulletin board packages during the 1980s would fit the same description, but the metaphor was typically more specific and concise. Contemporary language used in universities and corporate offices is dazzling in its vague generalizations. Very cute. We’re really impressed.