It also works well for the "new to Linux but interested in it and tech-saffy enough to learn quickly" people. For those it's an easier and fuller start-up than an install with the archinstall script that they can use right away while learning along the way. It makes it a good beginner distro for die-hard nerds, but I wouldn't recommend it for those not interested or tech-saffy enough to handle such an approach.

But yeah, I agree the main users are those who like the Archiness but want something that "just works" most of the time. Not necesarrily because they can't maintain it otherwise, but because they don't want too. The first group I mentioned can transfer into this one over time, while at other times switching to Arch itself or more thinker-friendly Archbased distros.

That group is relatively big however, big enough to create some market at least. It's why I still run it on many secundairy devices, less maintaining but keeps working. At the same time I know some who run it on their production machines for that, while thinkinger with Arch on secundary devices. Once they got a setup they like enough and figured it's exact requirements, they alter Manjaro to it.

I guess something like SteamOS is better for Archi but for nontech-savvy people. I can give it to my niece and she can use it, but due to it being immutable (unless purposely turning that off) and getting updates from Valve she won't break it easily. That is; OS-wise. While actually running the games tends to "just work" most of the time, the times it doesn't are too often and the thinkering then needed too complex to make it suitable for that group of people.