As is the thermostat is a set of brains that can be swapped in and out as time goes on. I just swapped two thermostats in two homes a few weeks back and it took

As is the thermostat is a set of brains that can be swapped in and out as time goes on. I just swapped two thermostats in two homes a few weeks back and it took <20 minutes each with no prior knowledge, even though in both cases I had to swap the backplate. What is the benefit you see of moving the swappable brains closer to the heating system? Doesn't that actually make the whole system more complex because now you have two separate devices where there is currently one?