Missed Opportunity is this Post
These metrics are tired silly ones. Open languages like which? Is Rails open? Did all the changes get voted on? No, it's the product of a dictatorship and the hall has pretty much emptied out. Is Go open? Is Dart? Was Java? Sun made the world's most popular programming language and their reward was to be predated by a brontosaurus still living off of data center FUD. As to 'has features from this language and that,' I laugh when I see such things. Those features did not originate in those languages.. ?? For instance, lambdas? been around forever. Generics? lots of languages have had them.
I was skeptical but after some looking at it the combo of Swift and the playgrounds is a brilliant move on Apple's part. It's not about making it so that idiots and children can program either. It's about making it so that programming has fewer timesucks in it that contribute nothing to the feature set, like running down alloc/release issues (pre ARC), or NPEs/errant pointers. The designers of this language looked at metrics and made some smart choices. Let's see if they pay off. Java made programming less hazardous than with its predecessor (C++), but the defect density is roughly the same with NPEs equaling the number of pointer bugs. The reality is, pointers are not that dangerous in C++ if you use a decent tool. The use of optionals in Swift is an attempt to just get past this layer of wasted effort. You could argue that in the latest incarnations of Java, with IntelliJ, you are almost already there because there are nullable annotations and lint warns of places where you could dereference something null, but tihs makes it part of the language.
Language has become fashion and nothing is worse news to the programming hipsterdom than to hear that their little hobby horses have been adopted by a competing show. Sorry guys, they were never yours to begin with.