Nowadays systemd has become much more than a plain init system and plans to grow further. This may leadd to problems from a user and system administrator perspective once you are hit by some bug. Systemd as a whole thing doesn't care about the Unix philosophy to do only one thing but well.
That's unfortunately quite common in the Linux space now, but systemd is for sure the worst offender.
Many and often highly skilled users left and leave Arch therefor or choose some different distribution or an Arch fork because there's no init choice in Arch Linux.
Whenever I've pitched Arch to users of other Linuxes or BSDs, the main (or only) complaint is often that it's "a systemd distro." Then Artix gets brought up and promptly rejected for being a much smaller project with fewer developers and users, making it less appealing for anything but casual/hobbyist use. Having a supported alternative on proper Arch would make a lot of people happy. I'd be very supportive of exploring this possibility from both a security perspective and to promote freedom of choice, but I expect you'll get much more pushback and complaining than support...