I don't know! It's a reckless thing to do, but satisfying. I tend to stick to killing the same relatively small set of processes, really, and have never noticed any ill effects in about a year. If I was less lazy, I'd research them all - but then I'd want to also research how to stop them running in the first place - and in some cases, like Edge, that threatens to be such a mission that I don't want to embark on it. (I have a script that's supposed to uninstall Edge, but I thought I should read and understand it before I run it, and that was months ago and I never did ... so I still have Edge.)