If you're gonna count Nano Memory you might as well throw in Sony Memory Stick

Can we count Olympus's xD-Picture format, too?

How about the 8-megabyte Cisco-branded PCMCIA flash card I've got around here somewhere?

I mean microSD was "transflash" by SanDisk before being adopted by the consortium.

Sure but you wouldn't call it an SD card before that point.

Looks like it's a similar standard by Huawei. [1] Very cool. I can see this being useful for tablets that have the SIM port but lack the cellular module. Wonder if this would ever make sense on an SBC.

[1] https://www.androidauthority.com/what-is-nano-memory-968723/

Note that "Nano Memory" is (or was?) a Huawei proprietary format - it is not part of the SD standard.

Right, its a Huawei standard, not an SD association standard so for the purposes of marketing and sales and pedantic people, not a "SD card".