Is it? The experiment is just that, a way to test your packages for breakage, the proposition to opt in via langfile is similar to Rust edition systems which wo

Is it? The experiment is just that, a way to test your packages for breakage, the proposition to opt in via langfile is similar to Rust edition systems which work fine. Way back when C# actually went through that change unconditionally (LangVersion was not a thing yet), and there was barely any breakage.