If the compiler doesn't have to think about recovery (i.e. errors should result...

But how does it help in the case of throwing an Error from a function...

It's also extremely useful for when D code is being called from other languages...

...to hang, so having these functions guaranteed `nothrow` can be valuable.

Of course, this is...

...class))
{
@safe:
    Node root() return scope pure nothrow @nogc { return _root; }
    this(uint dummy) @trusted...

...unwinding code when throwing Errors.  So yes, nothrow does win you some optimizations in some...

Isn't proper unwinding of the stack only required for Exceptions?

Obviously, nothrow documents the behavior of a function and is checked when the code is...

...means it can't be used in nothrow code. This argument has been had countless...

...C) nothrow void* core.thread.osthread.createLowLevelThread(void delegate() nothrow, uint, void delegate() nothrow).thread...