For me, the reason was really that I wanted to get one. Also, I got it a while back, and some of those PTZ cameras with larger sensors were not even available when I purchased the Sony.
I have the Sony paired with a large sensor PTZ, so while the PTZ tracks, the Sony serves as a fixed camera.
Additionally, I am probably going to add another larger sensor PTZ soon to enhance tracking, especially at night. I want to have them crisscrossing directions with 2-3 cameras so that vehicles approaching from the left or right are captured in great detail.
That is quite the camera list looking at your setup.
"
System :
Blue Iris 5 (i7-9700 Processor) 64 Gb Ram
175T. Storage.
Cameras
Camera 1) Sony SNC-VB770 W/F 1.4 Lens 12.2 MP 35mm full frame Exmor CMOS sensor,
Camera 2) DH-SD8A820WA-HNF 4K 4/3” 8Megapixel STARVIS™ CMOS AI,
Camera 3) Hik-Vision DS-2DF8C260I5XG-ELW 1/1.2" progressive scan CMOS 2MP,
Camera 4) Dahua DH-SD8A840WA-HNF 4K 40x 1/1.8” 8 MP CMOS PTZ AI,
Camera 5) Dahua SD6AL433XA-HNR 33x 1/1.8” 4 MP,
Camera 6) Dahua IPC-HFW5241E-Z12E 1/2.8” 2 MP,
Camera 7) 3x Dahua IPC-HFW5231E-Z12E 1/2.8” 2MP,
Camera 8) Dahua PSDW5631S-B360 1/2.7” 2MP,
Camera 9) Dahua SD29204UE-GN 1/2.8” 2MP,
Camera 10) Dahua IPC-HDBW4231F-E2-M 1/2.8” 2MP,
Camera 11) 3x Dahua IPC-HDBW4631R-S 1 / 2.9-inch 6MP,
Camera 12) Dahua SD22204UE-GN 1/2.8 2MP,
Camera 13) Dahua IPC-HDBW4631R-ZAS 1/2.9 6MP,
Camera 14) Dahua IPC-HDW4631C-A 1 / 2.9-inch 6MP,
Camera 15) 2x IPC-HDW5231R-ZE1/2.8” 2MP,
Camera 16) Dahua IPC-B5442E-Z4E 1/1.8” 4MP,
Camera 17) Dahua
IPC-T5442TM-AS-LED 1/1.8” 4MP 2.8mm,
Camera 18) Dahua SD6CE245U-HNI 45x 1/2.8” 2 MP,
Camera 19) IPC-HFW5242H-Z6E-MF 1/1/8" 2MP,
Camera 20) SD49425XB-HNR 1/2.8" 4Megapixel CMOS,
Camera 21) IPC-HDBW5242H-ZHE-MF 2MP, 1/1.8” CMOS image sensor,
Camera 22) IPC-HFW5442H-ZHE 4MP, 1/1.8” CMOS image sensor,
Camera 23) IPC-Color4K-T180 2×4MP Dual-Lens 1/1.8,
Camera 24) IPC-HDBW5442H-ZHE 4MP, 1/1.8” CMOS image sensor. "
