This is dumb. SD cards are HUGELY common in the professional world. I work in LA shooting and directing commercial shoots, music videos, photoshoots and have worked with Hasbro, Honda, Marriott, Demi Lovato, Nick Jonas, DNCE among others - SD is all over the place. Your equipment alone doesn't make you a pro. A pro uses the best tool for the job and budget - sometimes it's a Hasselblad, RED, or Alexa, sometimes it's a 5DS R, Sony A7RII or A7SII, or a Fuji XPro2 - or a fleet of GoPros to create VR material - and doesn't try and lump everyone into categories like that. Heck, I do extensive commercial aerial work for music videos and commercials on a DJI Phantom 3 Pro because it's portable, low key, and inexpensive to fly. It's all about how you use it.
SD is hugely common and only becoming moreso as speeds increase up and past what CF can offer. High data transfer needs are moving from IDE-based CF to SATA-based CFast, but SD is by far the most popular and is invaluable to me and a ridiculous amount of working professionals in the creative industry
And in the event that I didn't quite sell you, every single consumer camera on the planet that isn't a smartphone uses SD or microSD. That alone should be enough.
YAAAS! Your comment just snatched some weaves up in here! Well said! I can't believe that the SD slot is being downplayed in this manner, given the amount of pros who use SD cards in their gear. As a full time photographer, I would be annoyed AF if I had to carry around an adapter for my SD cards.