The question if swap is at all necessary always pops up as soon as someone mentions ‘swap’. 
When i read [1] i decided from that moment to always create swap.
The next questions always is, which kind of swap.
Example [2] here in these forums. Many other discussions are easily found here and elsewhere.
[1] https://chrisdown.name/2018/01/02/in-defence-of-swap.html
[2] Zram vs swap partition vs swapfile