Many other languages give the backwards compatibility promise. For instance Vlang (https://vlang.io https://vlang.io), does as well. But in their case, they l

Many other languages give the backwards compatibility promise. For instance Vlang (https://vlang.io https://vlang.io), does as well. But in their case, they limit it to a 3 year backward compatibility promise, which kind of makes more sense (also due to them being in beta). It gives them more flexibility to make needed changes to the language, but enough stability to limit issues for users. Though in general, such more open languages are going to be more responsive to users and their requests/needs, because of how they are structured.