I haven’t used Manjaro in years so my experiences are not up to date, but from my experiences it always felt unpolished and somewhat amateurish compared to other distributions, especially compared to Arch.
I’ve made Arch crash many times but part of their ideology is that Arch “is as stable as your are”. So when I made Arch crash it always felt like a fault of my own.
Manjaro, however, that has marketed itself as a new user friendly distro borked itself after updates just as often as Arch. Back in the day at least. For a newbie oriented distro I don’t think this is excusable.
Then Manjaro has done some really weird choices over the years, like with them shipping a proprietary office suite. As well as them not renewing their SSL certs in time for their forum. Several times…
Still, I don’t like the idea of point release operating systems so I’ve always kept to rolling release systems, and if you want a solid rolling release then I have to recommend OpenSuse Tumbleweed. Haven’t crashed even once in the 5+ years I’ve been using it on several PC’s and servers (in the form of MicroOS).