It would be great if the Lutron component (https://www.home-assistant.io/integrations/lutron/) had support for more than one main repeater. The Lutron Radio Ra2 system natively supports 2 main repeaters (200 devices) but that requires you to be a “Qualified Level 2 (L2) dealers/installers”. It would be nice if I could just configure HA with 2 (or more) main repeaters.
The L2 certification is worthwhile. The training class is pretty easy and does have some enlightening explanations about the hows and whys of device and scene configurations. The upside is you can speak to both repeaters through either of them. The export includes data for all devices and scenes can be set up on the repeaters to use everything. The only per-repeater limitation is occupancy based on the zones (aka rooms). This means if you want to have occupancy sensors in a room, or use repeater-based timer rollbacks, the devices involved need to be on the same repeater. But otherwise any on-repeater scenes can control any device, regardless of repeater.