I don't know enough about lightning to dispute it, but it would seem these reports about Opennode and McDonalds are in conflict with those reports. Do you have any local color or stories to add? I'm interested in what they actually are technically doing, I didn't know that Lightning could be "partitioned" but my Technical Spanish is rusty.
Are there any controls that would prevent folks from using Chivo to spend their $30 literally anywhere they wanted, in as much as there is a Bitcoin receiving address for them? (If I opened it up to "all lightning-capable nodes" would that change the story? I understand little in spite of knowing lots about Bitcoin and friends, something something, needs to be a route/path from one node to another?)
Chivo has just usual Lightning node as any other, you can follow it publicly here: https://amboss.space/node/02f72978d40efeffca537139ad6ac9f099... and you can see that they have direct channels with IBEX and others, so payment to many businesses from Chivo can literally be done with 0 sats fee. IBEX then has channel with OpenNode, so when paying to McDonalds there's a chance that IBEX will take some fee.
Nobody is required to use Chivo, but people are required to accept legal tender. There's no reason to expect that Chivo-Chivo transfers will go to the trouble of opening individual lightning channels for each user, which costs non trivial amounts of money for each opened and closed channel.
It would make sense that users of the app can settle with each other and it doesn't so much as escape the four walls of a database at Chivo-HQ. But McDonalds is a multi-national enterprise and won't be trusting Chivo (or any El-Salvador official banking infra, I'd assume) to manage their wallets.
It is really cool to see a (hopefully) successful application of Lightning on Bitcoin in the wild, from a person who has been nay-saying about Lightning. I will be really glad to see it succeed. But I'm dubious about the success of this app.
One should hope the two successes are not tied to each other – it's encouraging that there are other companies. I have no way to judge Chivo and I've never used their software, but I have little trust of governments to implement complex systems well, and if there ever was a case study of a burgeoningly complex system, I think Lightning and Bitcoin is the big one.