If we really care about backward compatibility  we should add new methods that are nothrow and put the existing ones thought the deprecation path.

I see that this has already done [1] but existing methods were never deprecated [2].

[1] https://github.com/D-Programming-Language/druntime/commit/640f0f46dc0be06a413da3d1f090bd0275c7bb96

[2] https://github.com/D-Programming-Language/druntime/commit/05b15ab05279a70b30f4a580c705526e70e09155

-- 
/Jacob Carlborg