Tom's Hardware: Crucial Caves: Says Chia Cryptomining Voids SSD Warranty, Then Retracts Post.
https://www.tomshardware.com/news/crucial-says-chia-cryptomining-voids-ssd-warranty-then-backs-down

Jim Bell's comment:

I wonder if DRAM-based SSD's would be practical for Chia mining.  There shouldn't be a need for non-volatility.    SD- cards get a lot of their density by constructing them in many layers, up to 144 I recently read.  

I  haven't been keeping up with DRAM construction techniques, but I wonder if DRAMs can be multi-layered in a similar way.

I also wonder what is the wearout mechanism for SD non-volatile memories.  Flash Memory Reliability, Life & Wear » Electronics Notes