C++17 it is a remarkable collection of many many features both in the core language and the library, which you can use now in practice (VC++, gcc, clang).
It might look that it is easy to learn and to use. But beware, C++17 is a lot more complex than it looks like. There are nice hidden features, significant remarkable design issues, and important pitfalls (especially when combining new features).
This talks covers the most important of them.