There are too many of these keys on mac laptops: fn, shift, ctrl, alt, command. Do we really need five? I'm sure you could work it down to three with a bit of thought.
You mean like the ctrl, alt, shift, & windows keys on a Windows keyboard? Add in the lack of a separate F-key row, similar to many laptops, and you effectively need the fn key.
So we're back to 5. Shift can't be killed for obvious reasons, it's main use is for inputting text, not commands. Fn can't be killed due to reduced keyspace while needing to remain compatible with full 101(+)-key keyboards. So all that really exists are 3: ctrl, alt, and command / win.
