Also #PCMCIA, #JEIDA card, #CardBus & #ExpressCard are all dead to the point that they cannot be reasonably updated and the only thing worth retaining (or rather learning from) is the mechanical interface and insertion/ejection mechanism.

#WhatsMissing: A more compact, #flash-centric competitor & open Standard compared to #RDX & #LTOultrium / #LTO:

https://mastodon.social/@kkarhan/116805733131165743
https://en.wikipedia.org/wiki/PC_Card
https://en.wikipedia.org/wiki/JEIDA_memory_card
https://en.wikipedia.org/wiki/ExpressCard
https://en.wikipedia.org/wiki/Linear_Tape-Open
https://en.wikipedia.org/wiki/RDX_(disk)