It's true that `std::expected` is like if a C++ programmer saw a type like Result in a shop window and copied the parts they understood from that and so certainly if you're a C++ programmer this is superficially satisfying.
The blog post uses, among other things, the Try operator ? and pattern matching, neither of which are available in C++ and both of which make the Result type much nicer to use than std::expected. There have been similar "I saw it in a shop window" proposals for both these in C++, and I expect that pattern matching in particular will be attempted again targeting C++ 29.
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It's true that `std::expected` is like if a C++ programmer saw a type like Result in a shop window and copied the parts they understood from that and so certainly if you're a C++ programmer this is superficially satisfying.
The blog post uses, among other things, the Try operator ? and pattern matching, neither of which are available in C++ and both of which make the Result type much nicer to use than std::expected. There have been similar "I saw it in a shop window" proposals for both these in C++, and I expect that pattern matching in particular will be attempted again targeting C++ 29.