It is good to have swap: if a bug makes a program leak memory, the kernel will not kill a random process (well, there is a heuristic) once the RAM is full. Instead, the computer will become unbearably slow (especially if the swap is on HDD) and the user has the time to identify and kill the faulty program. Also, hibernating needs almost as much swap as the RAM that in use. That is why you will often read to set as much swap as RAM. I guess having the swap SSD makes hibernating faster.

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