[maybeok]

Every software that's widely used and isn't a crap gimmick is written in C/C++.

Android/Linux is mostly C. Google Search-C++. Web browsers-C++. Java VM is a c++ program. Games-C++.

The only place Java/Ruby/Python/etc has a foot hold is in websites providing crap gimmics that are just wrappers over C/C++ programs. Like uploading a photo or tweet, just providing some glue over all the C/C++ programs that actually do the work.