I'm guessing that there are a lot of articles saying "We tried to embrace Swift, but found that it's not ready for prime time, so we're going back to Objective-

I'm guessing that there are a lot of articles saying "We tried to embrace Swift, but found that it's not ready for prime time, so we're going back to Objective-C for now." Meanwhile, no one's going to bother to write an article justifying their decision to switch from Objective-C to Swift, because it's an expected migration. So maybe that's a flaw in the whole exercise: it's only taking into account remarkable/unusual language switches, the ones people think are worth writing articles about.