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On the other hand, a modern SSD is probably faster than RAM on a spaceship from the 90s. (Don’t quote me on this, I didn’t double check).

All of a sudden I had an urge to get MS-DOS to run with a SSD as memory. Unfortunately I know DOS can’t address 1TB of memory, but the mental image of it is hilarious.

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I'm not sure you'll see this, but just in case: the Apollo Guidance Computer used RAM called "core rope memory", and the cycle time was 11.7 microseconds[1]. This isn't too far off from what the best SSDs can achieve for random reads at 8-10 microseconds[2], although these numbers are likely for their minimum block size of 512 bytes.

[1] https://history.nasa.gov/afj/compessay.html

[2] https://www.tomshardware.com/news/micron-finally-rolls-3d-xp...

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