^ I can tell you how L3 would work. (custodial L1/L2 wallets) Global payment processors with deals between them.... except they will probably be using L2/L1 to settle between them regularly (ie: hourly?)
IF Bitcoin some day gets massively adopted, that's how it will be done. You can quote me for posterity.
Yes i can see it happening that way, but what i meant was from a technical point of view how they will achieve this.. so it is trustless and open.
They will probably just reuse LN channels and just settle them regularly. With enough transactions, maybe they would be settling those channels hourly... after processing thousands of individual transactions in that time over each channel. Current LN channel capacity limit is just a temporary safety measure... It will get raised as needed.