There is a tension between me wanting to use the fanciest shiniest features and me wanting it to be usable by the widest audience (even people using Microsoft compilers). I know of people that are still migrating their commercial code bases to C++14 that are interested in using them. It is probably in my best interest to support them, so it will take a while until I start using newer standards.

Anyways, the _implementation_ of the data structures themselves does not really benefit that much from C++17 (well, there might be some interesting stuff that I could do with hazard pointers...). However, people using the new concurrency stuff from the standard might really want to look into using immutable data structures to pass data between tasks.