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Dell and Lenovo may limit mid-range laptops to 8GB DDR5 RAM in response to rising memory prices
(www.notebookcheck.net)
This is a most excellent place for technology news and articles.
Apparently there are m.2 NVMe drives with DRAM caches.
I don't know if anyone makes a pure DRAM NVMe drive
it'd forget its contents every boot
but if so, on Linux, you could make the block device a swap partition.