I prefer 1911-pattern pistols that can be repaired using the vast supply of 1911-pattern parts. To me, that's part of the allure of the 1911 platform - independence from a single vendor or source of supply.
So is your definition of a 1911 a gun that will interchange all parts with the original design?
Is a Series 80 Colt still a 1911?
Is a bull barrel 1911 still a 1911?
Other than the extractor, what parts of a S&W will not interchange?