@ryanc@infosec.exchange zRAM really falls down on systems with low RAM because it's too easy for the system to get stuck in a compression/free RAM/decompression/full RAM/compress again loop. And on systems with more RAM you don't need to use zRAM, so it's pretty useless. Swap on disk makes sense for both hibernating and for pushing out data which is almost never used once the system has finished booting. It clears out some space in RAM and almost never needs to be loaded back from disk.