One reason is that literally every programming language ever invented is a viable choice. Firmware is generally C. iPhone apps pretty much have to be Objective-

One reason is that literally every programming language ever invented is a viable choice. Firmware is generally C. iPhone apps pretty much have to be Objective-C/swift. Android apps are Java, or occasionally another JVM language. WebDev? Take your pick...ruby, python, java, haskel, clojure, perl, etc. They're all relatively easy to use for web dev.