I think this works under DMD

try
{
	throw new Error("some stuff");
}
catch(Error e...

I don't like it, personally.  It doesn't seem a good idea for a...

...exit/success/failure) and you have a RAII as complete 
 as Python's 'with' statement...

...is no dtor to call? (sometimes the RAII isn't needed, but the speed is).

Not. But it will get RAII destructed.

...handles and locks, etc when using an RAII approach. The GC cannot know what order...

...in D. You can't really do RAII except in the slightly defeating-the-point...

...that I cannot use scoped_handle as RAII, but only as a
separate object defined...

...Even techniques that I consider commonplace, like RAII, seem to be unknown to many/most...

...that unfair. D has good support for RAII now - possibly better than C++'s on...