The main reason I want a glass break sensor is to protect the house while I’m sleeping.
In Away mode, the Ring motion sensors would catch anyone that breaks a window to get in, but in Home mode, which I use when I’m asleep so that I can get up for water/the bathroom/whatever without setting off the alarm, the motion sensors are off so anyone that shatters a glass windor or door could get inside without tripping the alarm.
I do have cameras and lights outside as a deterrent, but the lack of a glass break sensor would still make a “smash and grab”-type break-in doable, and it simply isn’t feasible to stick contact sensors on every pane of glass as a stopgap.
Ring is a great system but this is a pretty glaring hole in it. I would gladly buy one or two glass break sensors if Ring came out with them. Most of Ring’s competitors offer one, so I can’t imagine why it’s so difficult for Ring to find an OEM to make one for a reasonable price.