igorbrigadir
commented
5 years ago I think i got most of them...
No exact day for:
"replies becoming convention" from 2006-10 https://developer.twitter.com/en/docs/tweets/data-dictionary/guides/tweet-timeline
"Retweets become a convention" 2007-04
"$cashtags become a common convention" 2009-02
A few others still missing.
Several entries don't have an exact day of the change, or missing url.
Some entries are clearly duplicated, eg: some of the ?? ones are just referring to an existing documented change and should be removed.