Rolling release 🤷🏻♂️ there might be updates which cause issues where you might need to rollback, if you can handle that it shouldn‘t be a problem.
I‘m using Arch myself since about 2 months and never happened that an update break something for me - when something broke it was my own fault.
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