Isn't it true of any, in-memory buffer implementation? It is very easy to add some form of recovery/persistence to a GenServer. You can have it write to a DB,

Isn't it true of any, in-memory buffer implementation? It is very easy to add some form of recovery/persistence to a GenServer. You can have it write to a DB, ETS or disk. You lose some throughput obviously, it's all about balance.