We can learn from El Salvador, how they work and try. Then we can see the current condition of the results. I'm not saying it failed, but they are still working hard with new ideas. They are still quite difficult to use Bitcoin as payment.
If we dare to face reality and admit the truth, the use of bitcoin as a currency and its application in El Salvador have failed. BTC cannot help them improve their economy as expected, otherwise they would not need to borrow money from the IMF and have to comply with many harsh terms from the IMF.
The only benefit they get is from their bitcoin investment. That shows that using bitcoin as a currency does not solve any problems and does not bring as many benefits as many people think. Obviously, bitcoin is more suitable when used as an investment, a store of value.