[staticint]

> this could form the core of yet another cross-mobile-platform development framework

Why not bridge the "yet another cross-mobile-platform development framework(s)" that were written for Objective-C, the same way Apple did with their frameworks? There is no need to restart them all over again in Swift to access them in Swift.

Perhaps you were attempting to suggest that no quality cross-platform frameworks ever materialized for cross-platform development under Objective-C? (there were certainly attempts, including from big players) But if that is the case, I'm not sure an arguably better, but not dramatically different, language is going to change anything.