There's no need to introduce the concept of multiple lightning networks; it's unnecessary nuance. Lightning functions similarly to the Internet with many interconnections, some of which will not work reliably.

Success is not guaranteed for custodial lightning providers that will be easy targets for regulators concerned about sanctions, terrorism, etc.

The future of sovereign lightning operations has fewer embedded assumptions and (with good privacy practices) be able to effectively bypass regulatory clampdown around private payments. Continued operations will be highly valuable to be the steadfast, reliable, and counterparty-risk-free option in a world of traditional payments plagued by debt.

Don't ignore the market incentives to improve the user experience for sovereign lightning because this market is gargantuan.