I don't agree with the article that it is 'end' of Linux, whatever that may mean, but the article argues that because SystemD is changing what Linux stood for -

I don't agree with the article that it is 'end' of Linux, whatever that may mean, but the article argues that because SystemD is changing what Linux stood for - simplicity, never break userspace, keep as many things in user space as practical, and keep the kernel version dependencies on userspace to a bare minimum and in addition is also rewriting lot of battle hardened software like resolvd and in doing so it will introduce instability and security issues. I guess the point is end users will shy away from the short term mess and move to another system like FreeBSD. While I don't know if SystemD is a vastly superior design and implementation to any of the already existing things and I am not sure how much of a stability/security/complexity concern it is, I think that the 'end' of Linux will not be due to SystemD - it has a lot of momentum going for it. It will take something bigger to derail Linux at this point.