The boxes may be green but just two weeks ago I had to report two msvc bugs, one against if constexpr and one against requires-expression, which breaks very simple language examples. In practice it's much buggier than GCC (second least buggier) and Clang (by far the least buggy, I think I only ever reported a couple of core bugs to clang versus maybe 30+ for MSVC even though Clang is my main compiler and I use MSVC only for testing)