>>2477111There's tons of benefits to bivvies
-They can be used in any terrain without having to be set up, tents need open space and hammocks need trees, a bivvy can be set up under a bush
-They're low profile so if you're sleeping in a rural area you won't be noticed
-They weigh less and take up less space than a tent (yes I know tarp defeats the purpose, but I only had the tarp for winter because it was cheaper to get the tarp and discard it later than to spend 800$ on a tent or however much they cost.
-Which leads me to my final point is that bivvies are way cheaper than other shelters. Can get a very solid bivvy for less than 200$, while a good tent is very expensive
They're not very comfortable so if you're a wimp it might not suit you, but they have widespread use in the military for a reason.