How would they know who uses it and who doesn't? That's just stupid. ExpressCard should be standard in all laptops.
SD card...really? What if the person uses a Sony camera which has MemoryStick? They have to use a USB to Memory stick adapter. They could have included an ExpressCard multi card reader that doesn't pop out. Much better, imo.
They know because they did their market research. Hence they left it in the 17" MBP for power users. I am one of the over 99% that don't use the ExpressCard and am happy with the SD card reader. Sony memory sticks are not the industry standard. The memory stick is the sony standard. What's next supporting floppy drives that less than 1% of accountants still use?? and haven't switched over to usb flash drives.