Sigh. Bitcoin BTC, at 3 transactions per second, doesn't have the capacity to support El Salvador's economy. Even if Lightning worked (it doesn't), BTC doesn't have enough capacity to open channels for users at a reasonable cost. Salvadorians will end up forced to use proprietary payment networks denominated in BTC. BTC is not cash anymore, it won't work as such. There are other cryptos that could work, we'll have to…
What doesn’t work? I’ve only skimmed some LN search results, and it looks like there are a bunch of services using it, including strike [0] which was mentioned in a comment of the big thread here [1]. This would have the same problem (proprietary network) you mentioned, but it seems to be working still?
[0]: https://strike.me/