I was not including SDXC or even SHDC cards, only SD. I am trying to find a maximum capacity SD card to use in a Palm T|X, either 1 or 2 GB. Back when SDHC first came out, I often ran into issues with 2 GB SDHC cards not working on older devices. I think being difficult to find is another criteria to qualify as obsolete.

The odd thing about high capacity SD cards in general is that they are generally used as fixed storage. I have a 256 GB card that I put into a 11" laptop when I bought it and I haven't seen it since. I haven't used a CF or SD card like a floppy since storage hit 4 GB.

I agree that I spoke too hastily about optical media. Even modern gaming consoles have optical drives.