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Monero Project admits thieves stole 6-figure sum from a wallet in mystery breach
(www.theregister.com)
This is a most excellent place for technology news and articles.
You have no idea what that phrase means.
The "immutable" I'm talking about here is not in the sense of "immutable OS", but rather immutable like punched cards. You literally needed to punch another set of cards if your program contained a bug. You need to create another smart contract to replace your buggy program. Paying gas fees for it.