I meant it as "general use" language, as in a language that's widelly used for several things.
I'm quite suspicious of the methodology of that JetBrain survey, since 47% would put Kotlin above the likes of Python for web backend development, which is the most ridiculous claim I've read in quite a long time.
Certainly big corporates aren't using Kotlin (with or without Spring) for making middleware (which is not at all the same as web-development) and "big name companies" "using it" doesn't mean much because merely trying it out for 2 weeks with a handful of developers on a side project fits the definition of "using it". If it was that successfull you would be hearing about actual large projects. Frankly it sounds a lot like a certain kind of marketing messaging I've often seen in the past for other kinds of languages or frameworks some large tech company or other was trying to convince developers to use, and such manufactured hype doesn't really mean anything when it comes to the actual usage in the field.
Certainly that idea about Kotlin's "success" isn't something I'm seing in the hiring side and if companies aren't hiring for it they're not using it seriously.
(PS: The idea that Apple would use it is pretty wild as Kotlin was created in response to Apple coming up with their own language for smartphone development - Swift - which replaced Objective-C, and they're pretty similar in terms of the language features they add over the languages they replace, so it's kinda silly that Apple would give up on the developer-lock-in benefits of Swift to adopt the language of its competitor which is also trying to achieve the same kind of developer-lock-in but to benefit Google instead of Apple).
