Problem with El Salvador and their Bitcoin legal tender bill is that big majority of people don't support Bitcoin and they don't understand it, thinking they will lose they money so they prefer sticking with dollar in their shops.
Few days ago some leftist group even organized public protest against Bitcoin, despite ban that government imposed for all protest, so it is not all good news from El Salvador.
Someone should educate people there about hyperinflation and what is happening with dollar and all other fiat currencies.
The protest seems motivated more by the politics of the Left parties, which used to enjoy greater influence in an earlier period. Though, one cannot discount the possibility that a lot of people maybe genuinely distressed by the change. Nobody likes change, especially something as radical as being the first country in the world to make Bitcoin legal tender. It is obvious that the political opposition will do everything they can to make an issue out of it.
Rather than the hyperinflation argument, the argument for using LN and Bitcoin in El Salvador is about financial inclusion that can enable people to easily save money. The merchants are free to convert received BTC to USD instantly but the smaller details like conversion rates and fees maybe the friction points. It has been hard to get a gauge on what the President is saying because he has been making most posts in Salvadorian/ Spanish on Twitter. Let us wait and see how this pans out.