> Some of us would say well-designed instead of simplified :-)

That's a longer topic. Having worked professionally both with Java (Eclipse, Netbeans, IntelliJ IDEA) and Common Lisp (Emacs + SLIME), I've experienced both sides of the coin. On the one hand, working with a language without a proper REPL and macros is painful to me. On the other hand, I frequently wish it was even possible to have semantic completion and automatic refactoring in Common Lisp, even at 10% of what you get for Java out of the box in an IDE...

C# has both semantic refactoring and REPL. It might look like Java, but it's a much better designed language. They are even fixing all the horrible crap that was dragging it down with .NET Core.