Comment by hyperific
RAM Disks. Basically extremely fast storage using RAM sticks slotted into a specially made board that fit in a PCIe slot. Not sure what happened to the project exactly but the website disappeared sometime in 2023.
The idea that you could read and write data at RAM speeds was really exciting to me. At work it's very common to see microscope image sets anywhere from 20 to 200 GB and file transfer rates can be a big bottleneck.
Archive capture circa 2023: https://web.archive.org/web/20230329173623/https://ddramdisk...
HN post from 2023: https://news.ycombinator.com/item?id=35195029
There's now a standard for memory over a physical PCIe interface (https://en.wikipedia.org/wiki/Compute_Express_Link) and off-the-shelf products (https://www.micron.com/products/memory/cxl-memory).