So on the other hand, you don't think there are one-liners that could crash SysV init? And it's not like everything was golden back then ...
I tend to agree more with
this commentThis article starts with a bug. Note, it's a pretty irrelevant one that doesn't appear to be reproducible on recent builds.
Then it brings up a few other debatable issues, and then it incorrectly generalizes that systemd security is terrible. I say debatable because for example parsing command line parameters isn't something people usually delegate to a separate process.
Unfortunately, it also ignores all the great systemd security features it has added for the average Linux user (such as private tmp, and cgroups), and in fact all the other great features it has.
FWIW, as this is also only mentioned in the comments, the command mentioned usually does nothing for recent versions.
See also the respective bug report
https://github.com/systemd/systemd/issues/4234 (which the author of that article forgot to mention/report ...)