Does OSX let you pick and choose stuff during the installation? No? Wonder why... <hint, hint> (and yes I know some aspects can be customized during the install, but not what most people here are looking for or discussing)
Does any modern Linux distribution let you pick and choose during the installation precisely what you want? No? Wonder why... <hint, hint>
And don't play semantics here: I am speaking about modern common popular Linux distros like Ubuntu, Fedora, and others that have GUI installers - so they're compared with Windows and OSX - and they simply do not give the user the options that people seem to feel are their god given right to have). I ain't talkin' about Arch, Debian base, Gentoo, etc... those are hardcore and way beyond your average Joe (not me, I assure you).
We are talking about the Enterprise version. That is why division between products must be concrete. The needs are more different than ever.