What about compatibility with old code? We don't like introducing breaking changes unless they really improve development.  Also what is wrong with writing out std::visit? We have like 5 verbose cast types and STD library is already verbose as it is. https://lists.isocpp.org/std-discussion/2026/09/3467.php I don't see a benefit to this really, it kinda complicates matters for the compiler/code scanning utilities etc