In just over a year the only thing that ever broke was a minor thing (probably a bug in KDE that slipped through) with no practical impact and an easy workaround, which then got fixed in like 3 days or something without any intervention from me. I've had more (in numbers) and more severe breaks in the same time frame on a server at work that's running debian, one of which was related to actually booting the server.

The whole "rolling releases are so unstable" mantra gets thrown around a lot, and it almost stopped me from trying CachyOS/Arch when I switched. My personal experience has been the complete opposite. I honestly can't tell if people who never tried these distros just keep repeating what they heard or read somewhere, or if I really am just pretty lucky.

I love that I don't have to worry about getting some semi-modern software to run, like I'm often worried when on a debian based server and have to manually install so much shit by hand that I'm losing track, which I then manually have to update in the future. On CachyOS, I just assume whatever I can install is the latest version (it usually is, only once was it not I did took a minute to figure that out as I just dind't expect it anymore). And usually I can just install whatever I'm looking for.

Another note: I'm running CachyOS on both my desktop and my laptop. My desktop I use daily, and I usually even update daily (it's just the way I'm wired, and I don't mind). My laptop I use rarely and consequently I only update it every few months or at least weeks. Neither approach has caused any issues. But do not assume that your install can't break either, things can go wrong (as they can on Windows). But support for even relatively specific problems is reasonably easy to come by, and people are generally helpful (discord, forum, ...).