Languages that have seen their fortunes decline include Perl, PHP, and Ruby. Software quality services company Tiobe’s suspected cause is a desire among developers for higher quality than is afforded in scripting languages: “Because quality demands are getting higher and higher, hardly anybody dares to write a critical and large software system in a scripting language nowadays.”
With scripting languages, most errors show up in runtime. And this is a problem, Tiobe says. Developers can write unit tests to compensate for this but it still is “quite dangerous” because these errors can happen while the application is in production. Statically typed languages, meanwhile, have responded to the threat of scripting languages by reducing type verbosity.