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?
The Chinese writing system probably isn’t so bad with predictive text entry (perhaps even better than English) but I think a tonal language with limited sounds has some challenges taking on the dominance of English in global culture. I like songs in other languages but being able to listen to artists from South America, Mexico, Germany, Italy, Norway, Finland singing in English is a privilege I don’t take for granted. When you go down the rabbit hole and discover a country like Japan has a lot of talented musicians it is sometimes hard to understand why they don’t have more global recognition until you understand that countries struggles with English language proficiency.
Also English vocab borrows from all around the world. That gives a lot more flexibility for word choice than a language like Esperanto.
You still need to know most of the common characters, otherwise you can’t actually read the language.