I have always been afraid to install Arch because they tell you it is difficult to install and unstable. I want a simple system following the KISS philosophy and install only what I need, which is little. I don’t need anything from the aur repository, for now. Just a year ago I installed Arch and there it is, no problems and doing every day pacman -Syu. It has been a real discovery for me, it’s the only distribution I’ve had this last year that hasn’t crashed. I didn’t expect it, but Arch has made me change my opinion and pay less attention to the opinions of “youtubers” and more to my own experience. In your experience of use, has Arch been stable in its operation?
I personally don’t use Arch, but I think the reason so many people find it stable in practice is because they know their system well. When something breaks or needs to be changed, they know which configuration file to edit, which package to {un,re,}install, what to look for in the AUR, etc., and they can usually avoid those things in the first place, because they went through a fairly hands-on install process, not to mention having the best Linux wiki in existence at their disposal.
On top of that, I think a lot of derivatives of Debian, including Ubuntu and all its derivatives, severely undermine their stability by providing custom configurations for or changes to software that are rarely documented and completely transparent to the user… until they break and leave no indication of how to fix them. Which is one reason why I ended up using base Debian.