Being able to perform swaps with other providers on existing infrastructure is a great benefit, no? I can’t run all swap services on my local network and also one day hope to be able to interact with RGB channels. Having to spin up a new node, acquire coins and open channels for each system i might interact with feels cumbersome and wasteful. I desire a “common” testnet Lightning Network
I agree that would be great! But sadly the last decade or so of Bitcoin testnet has demonstrated that people mostly aren’t willing to put on the effort required to do so (which is very substantial!).