There were many lingua francas of which French was supposedly the first global lingua franca. That changed and it became English (from what I understand). We will probably see another language become the lingua franca, so my question is: should it be English? Are there better candidates out there? Why / why not?
No, most people are pragmatic in this case and eastern countries changed from Russian ~30 years ago so another change isn’t coming any time soon.
As my parents saw the change from “it is really appreciated that you can speak English” to “it is expected that you can use it”. I can tell that it is so engrained in our multinational exchange that it won’t be even desirable.