Stellar is already fast enough, but I think it will improve scalability. Stellar aims to be "the internet of money" and for this the current throughput of 1000 tx/s is just not enough.
Right, but that doesn't seem to answer my question. I know that Stellar isn't quite fast enough to become the word's money transfer solution on its own. It appears that the Lightning Network (or some other solution) needs to go into the mix for that. But once we're using Lightning Network, why do we need Stellar? Does Stellar have any advantage over Bitcoin as the underlying foundation? Or is the idea here just that Stellar doesn't want to be left out of the Lightning Network, rather than it solves some problem that LN would otherwise have?
EDIT: Proposing an answer to my own question, perhaps LN transaction fees could be significantly lower if using Stellar rather than Bitcoin as the supporting blockchain? If so, does anyone have any estimates regarding the difference?
EDIT 2: It does seem that there would be an advantage to Stellar at the time a channel is closed, since the fee for the underlying blockchain transaction should be significantly less.
