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I understand and empathize with your fear. C++23 added a type with 22 constructors (http://en.cppreference.com/w/cpp/utility/expected/expected.h...), that ought to be enough to strike fear into anyone.

Don't worry, C++25 will deprecate half of them and C++27 will remove them while adding 20 new ones just to be deprecated in C++30.

C++ standard and deprecation is a contradiction. They almost never deprecate things. Things always go more complex.

They're deprecating stuff a lot these days. Add in one version and remove in the next.