I guess C++ would have been more well served by having static RTTI, but if it comes will be only on C++20 most likely, although type traits and template meta-programming already get us half way there.
However when I look to such examples, I am quite happy to spend most of my time on JVM/CLR lands.
It is not the meta-programming as such, rather the decltype, trailing return types and SFINAE tricks that put me off.
In the case of Unreal we used it to extend the RTTI system to to more things than just isA(). Stuff like member properties(editor hints in window), serialization(network & disk) and stuff you'd use C# attributes for.