Some fancy SSDs have additional DRAM cache:
The presence of a DRAM chip means that the CPU does not need to access the slower NAND chips for mapping tables while fetching data. DRAM being faster provides the location of stored data quickly for viewing or modification.
The last lawnchair beta came out a few months ago. It’s been running really stable for me and I would recommend it.
https://github.com/LawnchairLauncher/lawnchair/releases