Sure, but these were languages that arrived with at least one huge improvement over the languages that existed at the time. Dart's async/await coupled with Flut

Sure, but these were languages that arrived with at least one huge improvement over the languages that existed at the time. Dart's async/await coupled with Flutter's proper support of it in their SDK is that huge improvement for me in mobile dev. In my experience, Swift is lacking any particular major improvement over ObjC. It seems like async/await could have been that big step, and Swift probably shouldn't have been adopted until it was in place. Just wasn't worth it. I realize that's a controversial topic and I know people who love Swift, just from my perspective it was such an enormous cost without enough upsides to justify it.