Some folks that aren’t used to a saw don’t realize how much they leak - primarily bar oil, but sometimes fuel in the heat of the day. Cheap leak more than expensive, but regardless a saw case protects the contents of your truck more than it protects the saw. If you are a clean freak, or it gets stored in a camper or back of a Suburban/Expedition, top quality battery saws would be worth it. You can also drain all the gas and oil so it can’t leak, and simply fill it when needed, but it will still stink inside. The aluminum Sigg bottles designed for white gas are mostly leak free and great for storing small amounts of bar oil and gas if your temps aren’t crazy high. A qt of gas and pt of oil goes a long way with a small saw.
Super sharp arborist hand saws cut faster than most people realize. I remember going Christmas tree hunting and the other family laughed at my little saw, until it cut much faster than their big bow saw.
Also, don’t discount a big cordless sawzall for quick small jobs - 10,000 cat converter thieves can’t be wrong. An eight inch pine log would cut fairly quick, but I wouldn’t want to buck an entire tree with it - just like a good handsaw.
Every boy in America dreams of one day having a chain saw. Just remember three things: the tip of the bar can quickly kick the bar and spinning chain up into your skull, whatever body part you place a moving chain on will get cut with 100 sharp little knives, and trees are deceptively heavy and even small ones can break your legs as you try to run away from a bad cut. Being self taught is sort of like turning a kid loose with a 22 and telling them to not shoot themselves - it’s better to have someone walk you through the does and don’t, and still, some kids will shoot something they shouldn’t. Lol
A friend of mine shot himself in the leg with a 22 and had 11 bullet fragments left in there, until a chainsaw accident after which there were only 9 fragments. Lol