Well, I was stunned to see the title. After opening the thread, it turned out to be El Salvador. After accepting Bitcoin as legal tender, El Salvador's acceptance of Bitcoin should be nothing special. The government of El Salvador supports Bitcoin, so institutions in the country will slowly accept Bitcoin.
El Salvador accepts Bitcoin, and it is only a matter of time before the merchants of the country accept Bitcoin. However, this move is good news. McDonald's is a private company. Accepting it means McDonald's recognizes Bitcoin.