Yes. A distributed custodian at least, which is very unique (basically I know of only Fedi attempting to do it this way, and Cashu doing multimint payments, so distributing the risk by amounts). 

And it's chain level compatible with Lightning and can be one network.

You could even bridge your coins to channel backed by mainnet Bitcoin, or pay from both channels atomically.

Or do things like "bump this mainnet channel when fees are low, but in the meanwhile accept through Liquid".