Lexar's SD 8.0 card offers exceptional read and write speeds, but its practical utility is hindered by the absence of compatible devices. The card's high performance is enabled by its use of PCIe 4.0 lanes, but its full potential is currently unattainable due to the absence of SD 8.0-compatible cameras, drones, and card readers. While the card can be used with existing devices, its performance is significantly limited. https://www.notebookcheck.net/Lexar-introduces-the-world-s-first-SD-8-0-card-but-it-s-too-speedy-for-current-cameras.889163.0.html
It's a chicken or egg problem
SDexpress was touted for years now
But nobody has made one available until now
So camera manufacturers didn't bother using it
Compact Flash revisions weren't used in devices the moment their specs were officially ratified either.
Same with PCIe versions (where are they now, PCIe 7 is penned I believe, yet 5 is whats being used, hardly by consumers, yet clamored for where the real computing is happening)
Instead of beating the drum of "no devices exist yet" how about how the new standard compares to the CFexpress and SDXL alternatives we do have, and how it could possibly change things once adopted.
Seems needlessly defeatist, like most basic consumers who happen upon a texh article on something they wouldn't wrap their head around, let alone use.