There's very little in Arch that could break and will require support from someone familiar with Arch. Is that a disadvantage ? No in my opinion.

I would disagree on the fact that you get less support. There is GRSecurity and its RBAC, but you'll need some time to get used to it and fine-tune it. Of course, that's actually an advantage for serious people as it forces you to review the config files before starting the service. Bad for people who just want to run apt-get and install their default insecure LAMP stack to deploy their crappy vulnerable PHP app and pollute the internet. I recommend having a replica of your production environment in VMs and testing the upgrades there before rolling them out on the real servers. Some upgrades require manual intervention and can break. That's always a problem for me with most other distributions, and you can't easily change that either (at least not system-wide) as it will break many apps who rely on it. usr/bin/python is actually the latest Python 3, not the prehistoric Python 2.7. Installation process that doesn't force you to use any defaults and offers lots of room for customization - compare that to CentOS/RHEL which forces you to use LVM and swap, something not always needed (almost never in my case actually) It's also fast, better than yum, and maybe a tiny bit faster than apt-get. The package manager won't try to 'help' you by automatically configuring or starting the service you just installed (looking at Ubuntu/Debian). Package manager that does just what it says on the tin. No desktop-grade Networkmanager nor firewalld (looking at CentOS/RHEL). Network configuration tools that makes sense.

Systemd, though other distributions (even Ubuntu) are switching to it so it's less of a pro but something to be expected from any decent distro. Up to date software and big repositories I lost quite a bit of time with CentOS when something wasn't in the repos and I was forced to either compile it from source or install third-party RPMs/repos, and then end up in dependency hell because these third-party RPMs were conflicting with upgrades from official repos. No unneeded services - compared to CentOS 7 which started several VM-related services that weren't even applicable to me as I was running on bare-metal. Really minimal system out of the box, great for performance especially on low-end machines/VPS.

Nomachine arch linux