Home Assistant on the Pi and Plex on the tower, with a handful of smaller services tying them together.
Two boxes split two ways. tars runs the smart-home control plane: Home Assistant with HACS, Zigbee2MQTT against the SLZB-MR1 coordinator, MQTT as the bus between them, AdGuard Home for DHCP and DNS, and the Omada Controller for the ER605. wednesday runs Plex as the centerpiece, with a handful of other Docker containers around it. Everything is in a container, which is the boring choice and very much the right one for a setup I would rather not be debugging from a phone at the airport.