It Depends how you measure "extremely serious photographers". Starting from Nikon d610 you have descent quality on sd-card plus portability in the same time. I understand that you can't put all the ports in the world in the laptop and while CF Cards reader would also be useful for photography I think sd-card reader or even micro-sd-card reader gives a compromise for mobile solution that covers many needs. Lack of this sd-card reader gives additional headache and nothing more useful as I see it.