Saw this update on the proposed ASTM standard for remote ID. It is significantly more reasonable than I had expected. Direct broadcast via wifi/Bluetooth for commercially manufactured drones like DJI, and operators of model aircraft without wifi and Bluetooth capability could just report their flight via a cell phone app similar to how LAANC works now.
spectrum.ieee.org

Electronic License Plates for Drones May Come Soon
New drone standard for remote ID submitted for approval
