I think the solution to scaling is to use custodians that are interconnected with Lightning.

It's like with traditional banking or Internet, We don't use FedWire (the central banking ledger) but instead use banks that are interconnected thanks to FedWire.

And for Internet nobody is his own ISP, still we can benefit from the benefits of the Internet.

I think if Coinbase started integrating Lightning Network it would be very great since it would give us a fully transparent publicly traded Lightning Bank in some way.