If you are currently on a legacy DDDL version (pre-814), here is a proven migration plan:

The flagship model with integrated BACnet or Modbus gateway capabilities.

"Newer is always better. Just go straight to 819." Reality: 819 assumes certain telemetry histories that only exist if 814-816 were run first. Skipping leads to suboptimal self-learning.

Last updated: October 2025. Benchmarks based on dual-socket Intel Xeon 8480+ with 512GB RAM and NVMe storage. Your results may vary depending on workload characteristics and network topology.