My Sigma fp has to record 12-bit CinemaDNG to an external SSD (SD cards larger than 64 GB can’t maintain the required throughput and 64 GB is enough for probably minutes). I might use the SD recording capability if I take the camera for a leisure photowalk (as far from professional work as it gets); I keep reminding myself to simply get a Wi-Fi enabled SD card so that I never have to take it out.
A memory card format that might be a bit more relevant here is CFexpress; but then again, it’s unlikely that as a professional you’d ever use your laptop’s built-in reader for this as opposed to sticking it into a box that automatically copies everything onto a 4TB HDD while you fill up another card.
By the way, tethered operation (wired or wireless) is used in professional photography as well, not just videography.
What we do instead:
• DSLRs, when used as video cameras in professional workflows, are usually wired directly to a computer, streaming down the wire like a webcam.
• Purpose-built professional video cameras record directly to SSDs (either regular ones, like Samsung T7s; or proprietary ones, like RED’s “mini-mags”) that you’re expected to mount to your computer over USB — either by them being regular USB3 devices themselves; or, in the proprietary case, by the manufacturer selling a USB dock you’re supposed to buy for your editing workstations.
Regarding commercial photography: SD cards have gotten so large — and wi-fi sync so fast — that even the largest RAW photos sync instantly and hardly make a dent in your storage. There’s no real point in taking a 512GB SD card out of a camera.
Keep in mind, integrated ports are only really a demand of professionals when urgent, portable connectivity is a requirement; i.e. when even the time required to find and plug in a dongle would be SLAs broken and revenue lost. This was a true need for professional photography when SD cards were small, as you’d often fill up an SD card in the field and need to “dump it out” onto your laptop to continue shooting (or swap it for another while handing off the first to your editor to establish a pipeline.) Today, it’s not.
None of the other tasks you listed have ever been urgent, in-the-field tasks; they’re tasks where you do have time to go back home/to the office, and plug in an SD-card reader dongle to do the task.