Two ISPs, one load balancer, WiFi 7, and DHCP that lives on a Pi.
Two ISPs come in: ACT Fibernet on a static IP as primary, with Jio Fiber as the failover. Both terminate at a TP-Link ER605 load balancer that sits on its own private segment and feeds a TP-Link BE6500 WiFi 7 router, which is what the home LAN actually hangs off. DHCP and DNS run on tars rather than on the router; AdGuard Home does both, with static leases for every smart device and ad-blocking applied across the LAN. The Zyxel unmanaged switch in the work room is the dumb pipe between wednesday, the SLZB-MR1 Zigbee coordinator, and the rest of the wired stuff in there.