2. Support for UHS-III SD Cards
In its bid to placate photographers and video producers, Apple reintroduced the SD card slot, not seen in a MacBook Pro model since 2015. What it didn't explicitly advertise is that the slot doesn't support UHS-III cards, which offer read and write speeds up to 624 MB/s. (That wasn't the only disappointment: The SD card slot on the new MacBook Pros supports UHS-II cards, but only up to 250MB/s of data transfer, not the 312MB/s speeds that the standard is theoretically capable of.)
This "complaint" is straight-up ridiculous. UHS-III is a spec, not actual products, and probably will
never be actual products.
You know how many UHS-III SD cards are currently on the market?
Zero. You know how many UHS-III card readers are currently on the market?
Zero. If Apple had shipped this with a UHS-III slot it literally would have been the first device on the market to support it. They presumably would have had to develop the silicon to run it themselves, and I don't know how they'd test it since there's nothing to put in the slot yet.
Further, it might have ended up being the
only device on the market to ever support UHS-III. Reason: SD Express is faster than UHS-III in every way, and
does technically have a couple of cards on the market already. I would be surprised if anybody went to the effort of implementing UHS-III when there's a faster standard already in existence and zero reason to use the older standard.
All of which is to say that if you were going to complain about something, complain that it doesn't support bleeding-edge SD Express or CF Express (which, unlike SD Express or UHS-III, is
already in use in professional products).
The thing, though: If Apple had put an SD Express slot in, it would not have offered any speed boost with currently-in-widespread-use UHS-II cards; they would have been forced back to UHS-I speed. And while CF Express is becoming the pro-grade-card of choice, putting a CF Express slot in would have made it incompatible with any SD cards at all, which would probably inconvenience
way more people than the lack of a CF Express slot will.
Basically: You're complaining about not supporting a standard that is currently vaporware, and there are concrete user-benefitting reasons why Apple might have chosen a UHS-II slot over either of the non-vaporware faster options.