I've heard that a lot of times. I don't think it's getting any more true. Regardless the details of the math, there seems to be a problem interfacing with the

I've heard that a lot of times. I don't think it's getting any more true. Regardless the details of the math, there seems to be a problem interfacing with the real world. If you want to use any of this for any practical purpose, e.g. buy a banana, at some point, part of the transaction is going to be off-chain. I've never heard of a way of synchronizing this without defeating the whole value proposition of the crypto stuff.