I just installed the FW from link above on my EmpireTech HDW5241H-AS-PV, it at least starts up and seemingly works like normal. Not the new interface which is probably good, since I'd expect it to take at least 12 months to be stable given how many updates and back-and-forth "AI" detection of Humans took before it worked well enough. Also a bit wary of what toll the new interface will take on the older camera CPUs since they seemed to be stretched to the limit even with the shipped FW. But maybe the new web UI won't be available for the Volt platform.
Anyway, the new FW seemed to add a few more IVS "AI" things that I can't recall I had in my January 2022 revision 13 firmware (this is rev 18 if I interpret Dahua's naming correctly). See screenshot. I haven't tried them out, I only use Tripwires for Humans.
Edit: there's also a "Smart Object Detection" tab under Event that I don't think was present in my previous FW either. That has a corresponding tile under Smart Plan too so can't be had at the same time as IVS, at least not on my camera.