When seaching for std::future::then on google, the top result is a stackoverflow question about the status of the function in c++17. Now that c++20 has been finalized and Clang and GCC is well into implementing c++20, I am left wondering what is the status of the function and the Concurrency TS generally?
It isn't mentioned on the implementation status page of libc++, libstdc++ or the implementation status page maintained by cppreference), and the TS page on cppreference doesn't say anything about current status.
I have also tried running some very simple examples on Godbolt, but neither are able to find <experimental/future>, and not because it has been moved to the <future> header (neither can find future::then.
Additionally, the internet has not been especially helpful. At least I can only find blog posts from 1-2 years ago talking about "hoping" to get the Concurrency TS in c++20, but cannot find any mentions in numerous overviews of new c++ 20 features (a few examples.
Has the Concurrency TS been dropped?