Any recent innovations? Because even traditional object-oriented languages like Java and C# seem to be getting more functional over time, and the endless attempts to add classes to Javascript only make it worse.

Lots of them, people only have to look beyond Java and C#.

Many of those "functional" features like LINQ, were already present in Smalltalk collections and CLU.

As for what inovations, OOPSLA, ECOOP, ACM, IEEE proceedings have plenty of research papers on the matter.