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Good riddance. MicroSD cards are way overused as a storage medium, and they are such a fucking crapshoot quality-wise. We are long overdue for an external variant of NVMe that can take it's place in all but the most micro of applications.

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But the electronics and protocol is so simple. I'll miss them when they're gone, because you won't be finding any DIY electronics tutorials to write NVME cards. And that will be a big loss.

Only the (much slower) SPI mode even has public documentation, not the native SD protocol.

“Abbreviated specs” have been available from SDA for at least a decade and have enough info to implement a working sd host or card.

Source: done both of those.

PCIE is simple too.

> We are long overdue for an external variant of NVMe

CFexpress, it's been around for a few years and already in a few major cameras

https://en.wikipedia.org/wiki/CFexpress

The only problem with CFExpress is since it's mostly deployed in higher-end cameras, card makers are charging pretty high prices for them. We need more value options before I think that format could take off on the lower end. Would love to see it though!

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