Swap is only necessary if you have low RAM or use most of your RAM in memory-heavy processes or multitasking.

If you've got more RAM than you'll ever need, you don't need swap. Although, these days maybe that means swap will become more necessary again.

Also, you don't need a swap partition, you can make a swapfile that works just as well.

I don't know what the point of separate partitions for OS and userspace is, but whatevs...