Similar situation, one thing I like the with the Pis design is you can throw PoE hats on them and build a whole home infrastructure system where the only thing that needs battery backup for power cuts is the main ethernet switch - all of the essential services, switches and wifi APs are powered downstream by their ethernet ports over PoE.

Makes making your key network services (VPN, firewall, DNS, NTP, home assistant etc) on battery backup very easy, as just one plug to the primary switch to keep powered, and my wifi/internet stays on when the power cuts.

I could use other devices, but 5 pis with PoE hats rack mount very cleanly in a single 1U row and passively cooled with no fan noise etc.