Jakdracula
TyGamerIt’s a lot cheaper to install one sensor per door than it is to install a motor for every moving compartment and a sensor to see if it needs to be closed and that’s just to make sure every door can be closed. A lot of extra circuitry for something they can just do on the cheap.
Doors can be designed to close by slightly angling the hinges which could be cheaper than a cloud based alarm connected to a smartphone.
While true, unless it gains enough speed it might still not properly close by itself. And the door can also be blocked. An angled door will also be a bit heavier to open and more annoying to use. It’s not a perfect solution, even if it is helpful.
Maybe an always tensioned hydraulic like on a screen door? I realize this is just self closing and not close on demand, but seems like it would get the job done.