The best way to keep an Arch daily driver stable is to use a CoW filesystem like btrfs or ZFS and use a pacman hook that takes a snapshot before package installation or updates. If you run an update or package install that breaks something in an inconvenient way 20 minutes before you have to be on a call using said system you just revert to the snapshot, reboot and you're rolled back. I've run Arch as my daily driver like this for 4-5y now and can count the number of times I've needed to roll back like this on one hand (mostly I just don't run updates when I'm under time pressure.) Arch really doesn't break in a major way all that often once you're over the first 6-9mo of the learning curve, ie: it usually stops breaking once you stop fucking around and poking things while you're learning about them.

I wouldn't recommend Arch as a daily driver to someone who isn't generally competent at linux admin and troubleshooting, it's a handful for people who aren't up on their skills yet. On the other hand it definitely will help you develop those skills, that just takes some time. A snapshot and rollback system gives you the freedom to break most things with a reliable way to roll back to a known good state afterwards.