"Being happy" is not a definition for when Bitcoin is still Bitcoin. Community Emotions are nowhere described in Bitcoins Whitepaper.
The only thing that defines if Bitcoin is still Bitcoin is its protocol rules. And Bitcoins protocol rules today, 2018/2016 or whatever point in time you want to chose between its hard fork and today, are not compatible with the original client from 2009.
OP's graphic is incomplete and that's all. It should go back to 2009 to clarify that this entire discussion about hard forks is a distraction to drivert from the simple fact that Bitcoin is not Bitcoin anymore by the standards you set to argue that it is Bitcoin.
What a clown show.
The moment RBF was introduced to the protocol, Bitcoin diverged from the coin that was described in the whitepaper. That's why there was a three year debate that started in 2015 and split the entire community into factions. There is nothing original about BTC anymore today. Its a mess of transaction types, protocol rules that replace already sent transactions, and circumvention of security protocols to create a mess that it's creator wouldn't recognized anymore today.