> std::variant and std::optional are not nearly as ergonomic or safe to use as rust equivalents.
> but I also use rust daily and you cannot really make a straight faced argument that c++ is catching up.
I mostly use std::ranges, lambdas, and concepts, and I see them catching up, as an evolutionary process rather than a fixed implementation in the current standard. Nowadays I can do familiar folds and parallel traversals that I couldn't do in the past without assuming third-party libraries. My optionals are empty vectors: it suits my algorithms and interfaces a lot, and I never liked `Maybe a` anyways (`Either errorOrDefault a` is so much better). I also use Haskell a lot, and I'm used to the idea that outside of my functional garden the industry's support for unions is hardly different to the support of 2-tuples of (<label>, <T>), so I don't mind the current state of std::variant either.
