...is not RAII , is auto-typed
auto C d = new C(); // c is RAII, is...

...RAII. The initializer is another matter, though. If it's 'new', it's not RAII...

...arguments);

At the same time, the old RAII meaning of auto would be deprecated, as...

...raii c = new classname();      // RAII, heap alloc
raii d = classname();          // RAII, stack alloc
auto raii...

...share the same name as the unrelated (RAII) auto. Not only it has now that...

...opCall to all classes, which are translated to RAII constructors when invoked from an initializer ;)

...to RAII anymore? I.e. would I also be able to create a RAII object...

...get confusing very quickly.

IMHO the non-RAII keyword should be something different. I think...

...an RAII class object would be:

    auto c = classname(arguments);

and a non-RAII class...

Very much agreed.  Cross-scope RAII is awkward to impossible in D, while shared_ptr...