I code C# for a living and I still prefer Java. A lot of the things added to C# are mis-features IMO. When stuff gets added to Java it's usually been thought out better than the way MS used to cram new features into C#. I quick look at C++ ought to show that every feature under the sun isn't always the best approach. I take issue with your "professionals who only know Java" line. I knew C, C++, Lisp, Pascal and Assembler before coding Java. I've learned C#, Javascript, Python and Rust since. I still consider Java one of my favourite languages. It's a pretty poor ad-hominem argument.