Existing and being necessary are two different things. Linux and MacOS are operating systems. Windows is an ad delivery system that masquerades as an operating system.
If windows were absolutely perfect with no flaws whatsoever, CrowdStrike wouldnβt be a necessity. I agree with that.
Unfortunately we live in the real world and no OS is perfect so software like CrowdStrike exists on lots of operating systems.
Btw, Crowdstrike isn't necessary but it's very nice to have for companies. You don't need real time protection like that on a normal client you use at home.
It needs that kind of access to fight advanced attacks.
It would surprise me if similar EDR programs didn't have similar access on Linux systems, for example.
Currently, cloudstrike offers two methods for Linux: a kernel driver / module and a theoretically safer alternative using epbf (you could call that "kernel level scripting"). Ironically, they triggered a kernel bug using that second option. They did not test all kernels they listed as compatible or something like that.