Neither is BCH's block size technically unlimited. What I mean is that it's way bigger than needed to accomodate the current users. If you get more users, the chain will blow up in size.
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it can adjust an unlimited amount of times. And if you are trying to help XMR you should probably be more honest
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A single party can't adjust it without a massive wealth transfer to the rest of the network for the duration of the attack.
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