Retrofit kit

I was reading about the new product coming out. I have a Vector 2000 wired system that was in the house when I bought it. I have never had it connected to the outside world. It has been unplugged for 10 years. I plugged it back in and all 4 door sensors still work. So do the 2 motion detectors. Is this system able to work with the retrofit kit? Does the current system stay powered up and the new bridge just tap in to the existing wiring? Or does the new bridge connect to the existing wiring and the old system powered off? Debating whether I just go all new or a combination of retrofit and new. I currently have a Ring doorbell and 2 external cameras. Thanks David.