I was amazed to find out a year or two ago that there were really no options to update your wired alarm door, window and motion sensors into a smart home product. It seemed rather ridiculous since there are and endless amount of battery operated smart home sensors on the market that you couldn’t make something from your wired sensors. Then one day I came across Konnected and all of a sudden there was hope.
If you no longer used your alarm system Konnected is a great option to install to make use of your existing sensors. It’s not an actual alarm system, but it cam be turned into one if you have the right smart home hub connected to it. Check out their guide on hubs.
Currently I’m using a combination of Home Assistant and SmartThings. The goal is to be 100% Home Assistant, but there are still some things like like that Samsung is doing.