Comment by olalonde

> though 20 blocks were rolled back on at least 2 occasions

Do you mean because of the bugs mentioned earlier or during the normal course of operations? Curious to read more about that.

> Regarding forks, there was BCH, BSV, etc. - those were not programming errors.

That's a different kind of "fork" though and those are arguably not Bitcoin. They're basically just competing cryptocurrencies that happened to use an existing blockchain to get started.