Aeternity has built State Channels into it’s platform by default. This is an advantage since Aepp (Aeterenity’s version of Dapps) builders can easily leverage the design to build scalable Aepps as soon as the protocol launches. Having built in state channels also means Aeternity is scaleable since regular transactions can be done through state channels (if you expect to make > 2 transactions with a particular party) rather than taking up resources on the main chain. For example a user may want to open a state channel with an exchange to make transactions fast & cheap (Binance was recently responsible for >60% of Ethereum daily transactions, this would have been reduced to near 0% if all users were using state channels thus clearing the main chain for other regular transactions)