On Sat, May 7, 2022 at 6:36 AM Seth via Boost
I'd say that polymorphic lambdas, lambda capture initializers, return type deduction, decltype(auto) are all more important and really felt. I can live without the library features (because they're easy to provide, except the UDLs)
Those are nice and all, but none of them improve the public API or usability of a library. They help the implementer, author, or maintainer of a library but that's it. If a user wants to use these features listed above, they can still do so in their own code by using C++14 or later, even if the Boost library they are consuming is written for C++11 (or C++03). On the other hand features like `std::pmr::memory_resource` or `std::variant` _do_ affect the public API of a library. Thanks