I think its just math
Are you talking about custodial LN? Yes, this is possible
Current state of channel factories could do a billion onboards a year. The math checks out.
The overall # of UTXO's is another matter, but that's a theoretical problem not an actual one.
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Still a theory isn't it? Is there a channel factory operational today?
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One with regarded assumptions, so it's a regarded theory yes.
Yes, every lightning node is a channel factory when it opts to do batch opens.
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I've got my eye on it. Interested to see how it would work
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