One of the things we hope to do with Lightning.Pub is enable bootstrap peering to/from other LPubs.

Using web-of-trust principles over the nostr's social graph, your node could identify good bootstrap peers endorsed by your follows list.

These "BSP's" would allow for more opportunistic liquidity options, rather than reliance on for-profit services. This would greatly increase decentralization while compressing costs.

There's a few things that need to be qualified of course as mentioned in the OP, which nodes could easily communicate over nostr, but mostly it's a matter of building out good automation.