You will always need some sort of oom killer unless you have endless memory (or swap space, which comes with its own problems in the form of grinding your system to an almost halt). Imagine all memory is in use, then some system critical task (or even the kernel itself) needs memory as well. If the kernel can't kill a less important process to free memory in such a situation you might just crash your system.
Hearing Snow by the Red Hot Chilli Peppers while my mom is folding clothes (thats a very specific one). I have no idea how old I was exactly but I remember it vividly. The funny thing is that I didn't understand a word of the song as german is my native language. Recently I stumbled across the song again and suddenly, as if struck by lightning, I remembered this weird mundane situation as if it was yesterday. The human mind is so weird.
Ladybird is a non profit developed by volunteers, no company.
Project lead is Andreas Kling (you should definitely watch his development videos and streams), great guy who developed SerenityOS aswell, an operating system from scratch. For that he developed LibWeb which he then used to create Ladybird. They only recently founded a non-profit, which is probably needed as the project size grew.