And this might be the key point: if a package like Gnome is broken, I personally blame the package rather than the OS. I don't see a GUI desktop as integral to the operating system, so when I say that Arch has been trouble-free, I mean that I'm always able to boot to a usable system console and get my work done. So that's my disclaimer, and probably the big reason people shouldn't use Arch: if you rely on a DE, and see the system as broken without one, you're probably going to experience way more breakage than I've reported.
I tried Arch and it's not the case, my examples:
PostgreSQL: https://www.postgresql.org/docs/9.6/static/release-9-6-2.htm... 9.6.2 released 2017-02-09, in Arch repos - https://git.archlinux.org/svntogit/packages.git/log/trunk?h=... - almost a MONTH later. 9.6 released 2016-09-29, in Arch repos - 2016-10-29 (version 9.6.1, they skipped 9.6) - again, a MONTH later.
Had issues with outdated Node.js and some other package I can't recall.
To be honest, up to date packages for me were only available with brew in macOS.
As a power-user, Arch "just works" for me far more than other distros have, because I know the system and it's simple, I've never had a problem where I didn't have a handle on it.