boothin

Yes, there are differences between those things.

Poaching is cooking in hot liquid, but the liquid is not boiling or even simmering, so it is a lower temp than both.

Saute generally means you’re using a small amount of oil/fat and stirring/tossing the food to spread the oil/fat around on everything while cooking everything. Pan frying generally means you’re cooking a larger piece of something and not tossing it around.

Exist but pretty rare or you have to solder them yourself. Here’s one I found on Amazon https://www.amazon.com/Plastic-AA-Battery-Holders-Block/dp/B01MQY5JZX

That’s not really relevant to the question being asked and the answer you’re replying to though. OP said straws should just stop existing because it’s only a convenience, and this counterpoint was that there are people who NEED straws, not as convenience but as necessity.