I don't think you got my comment right. I was advocating for apple to expand swift to other platforms ( android, pc desktop, web, server, whatever), in order to compete with techs like flutter.
The reason cross platform tools weren't a good fit before and are now is both because hardware is now powerful enough, and because platforms have now reach a stable point.
The reason cross platform tools weren't a good fit before and are now is both because hardware is now powerful enough, and because platforms have now reach a stable point.