Re: "unique screw head types and gluing or soldering components"
I wasn't jesting! The point I was making was the precedent in miniaturisation increasing the difficulty of repair. Going from discrete transistors to integrated circuits meant that if only one gate in an 8-gate array failed, you threw away the 7 good ones in replacing the component. Now we are not quite at the point yet where the screen is photogravured onto the same wafer as the processor, the LCD driver, the power components, the CCD etc etc. but that will come before too long, and at that point the integration of functions into a single manufactured component will signal the true and pure disposable, irreparable, phone.
Oh, and do you have a link for chipped vales? They sound fascinating!