Bitcoin dev Cory Fields discovered a BCH vulnerability that could have resulted in a split chain and substantial loss of funds. He responsibly(and anonymously) reported it to BCH devs and they fixed it before it could be exploited. Read this.
https://medium.com/@coryfields/http-coryfields-com-cash-48a99b85aad4
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Bitcoin devs are intentionally conservative in order to prevent mistakes like these. This bug was easily avoidable.
"After seeing the minimal review the changes had undergone and the large number of lines changed, I thought it reasonably likely that a bug might have slipped in"
@mattodell People are used to the SV mantra of "Move fast and Break things", this doesn't apply to Bitcoin
@mattodell I’m no dev but I imagine this is a huge issue with most shitcoins.