Lightning Network scaling alternatives? I'm really looking forward to the Lightning Network and all the efforts being put in by Blockchain.info, Blockstream, and others. But I was wondering if there aren't other options for decentralised scaling besides LN?

In particular, are there are other decentralised+offchain scaling models that have been suggested beside hub-and-spoke?
The obvious one would be side chains, the idea being that the transactions on the side chain would be off the main chain. Most other scaling solutions are either on-chain or centralized. For example, segwit and block size increases are on-chain and using a service like coinbase to move coins off-chain are clearly centralized.