* Characterizing off-chain transactions as bitcoin scaling is disingenuous. This isn’t peer-to-peer and almost totally defeats bitcoin’s purpose since you now NEED to TRUST third parties.
* There’s a much simpler solution than the convoluted evolution to hub-and-spoke/private blockchain. It is here today, retains all of Bitcoin’s original characteristics plus some and it would be quite easy to port Bitcoin’s ecosystem over to it. The only thing it doesn’t have is the exa hashrate, /YET/… compared to the private blockchain(s) which will /NEVER/ have it.
That solution is… Litecoin.