Nah, I run my updates maybe once a week on average. If afterwards something breaks, I simply do a complete Rollback (with e. g. snapshots). If after the next update its still broken, then I start to dig in „what“ is broken and how I might fix it
But as I said, it didn‘t happen to me yet - but I‘m also fairly new to Arch as well, so that‘s at least my plan on how I would go after it.
Iptables. Because in the end its iptables, so I learned it from the beginning „the right way“ and i am therefore not locked into one or another