I say pfft to this. The article makes a poor case. None of this matters if you have enough memory. Hence, calling swap "emergency memory" (or poor man's ram) is perfectly justified.

If you can honestly answer "How much swap do I need, then?", and the answer is not infinite, then you can just add that amount of RAM instead of swap and be done with it, no need for swap, unless you want to prepare for emergency.

"Ideally you should have enough swap to make your system operate optimally at normal and peak (memory) load." Ideally you should have enough memory to make your system operate optimally at normal and peak memory load. In a perfect world, everything would fit in CPU's SRAM and you wouldn't even need DRAM..