Just wanted to extend OPNSense, the community, FreeBSD, associated projects, and the Open Source community a thank you!!
I wrote a Linux ran multi-threaded Python detail to update several Aliases (two of which have 10k+ IPs) with IP lists via OPNSense API, and on average it is completing now in about 30% less time (that means I block an attacker (CrowdSec enabled Reverse Proxy + Suricata) at Layer 3 faster).
No change to my code, I've already tweaked it for speed in about every way (nice in Linux, pre-compiling Python...) and this speed up is purely because OPNSense continues to become a more lean/mean beast.