Dabbled in CachyOS as a replacement fo my main OS recently it worked well, was trying to do the omarchy on cachy for the kernel improvements but ended up bricking things when trying to update so ended up swapping to omarchy mainline. I am seriously considering swapping back over to cachyos though, seems like it's going in the right direction.
It completely blew up for me as well (unbootable) during an update that included the linux-firmware package split from earlier this year. Fortunately this occurred during a testing period in a VM.
I was dumb and rebooted without redoing the kernel install, otherwise I probably could have just rolled back and reran mkinit to get fixed but the bootloader entry had already been removed for the old kernel as I think I was also running some cleanup commands, and when I booted to reduced mode I had no network to try and recover so I just decided to reinstall. Helps having a separate drive for files. Didn't have to worry about a backup or anything so it went smooth
It was an Arch-wide thing, there was an announcement on their site about it.
Was also looking to see if that was possible recently. Wonder if either party would consider supporting that officially?
I'm enjoying CachyOS so far. I've been running it for a while without issue.