Whether Arch-based distros are for beginners or not is the wrong framing imo (though it’s a reasonable first approximation).
I would argue it depends on what kind of beginner they are and, almost more importantly, what community they can access for support.
I installed Arch Linux on my MacBook air back in 2014 or 2015, after less than 2 years using macOS and having only known windows XP and 7 before that. It ended up being the perfect distro for me to learn Linux, which includes having spent 2 entire days getting the system to boot on the “correct” OS with only the wiki and my own google-fu for aid. However I was enrolled in a computer engineering course at the time and had joined my school’s computer club where 4 to 5 experienced Arch users were on-hand most days.
If a beginner is motivated and has a reliable source of aid then the problems they’ll encounter using Arch can be the perfect learning environment. If they don’t, then as you write it quickly turns into a dealbreaker.



It is, but maybe they mean they want no limit whatsoever on post length.
which, well, if your instance starts sending out megabyte-sized text posts I don’t expect it to stay federated with many others for very long.