One of the white Macbooks used 50 screws to fasten the keyboard. Once I spilled some juice on it and had to replace it. Took forever, but at least back then it was not too expensive or difficult.

Could have been worse: I replaced a keyboard for a friends daughter and her Dell had ~50 plastic studs holding the keyboard in place, each one was melted rivet-style. I had to remove enough that I could get the keyboard out, but not so much that there wasn't still plastic to melt to hold the new keyboard in place.