pull down to refresh

have there been other hard forks in the past?
No, unless you count some of the very early development by Satoshi, which I don't think count. Nothing that happened before Satoshi's disappearance should be counted, imo.
It's important to note that hard-forks are not bad, by themselves. The problem is consensus... we have to be sure that more than 95% of nodes are going to join the new fork and allow the old one to die. Without ridiculously high consensus, a new blockchain is created, such as what happened with BCH.
Hard forks are great. But we need to have a motto that goes something like, "I swear to never hard-fork if there is not total consensus. Fuck Roger Ver."
reply
Any bitcoin improvement proposal must get 90% approval from miners to 'pass'
I think the threshold is 90%
The blcokchain/Roger Ver war in 2017 was interesting because miners wanted bigger blocks but nodes defeated miners
update: when did Satoshi disappear? I believe his last post on bitcoin talk forum was December 2011, maybe it was Dec 2010. He disappeared around the same time there was a lot of heat on WikiLeaks and Julian Assange