Yes it is expensive because it is a niche item. Still, access from any PC on the network without special software and the fact that it has triggers at all, plus scheduling. plus sunrise/sunset.
I'm thinking that a lot of core functionality can sit on this and work reliably even if the HA PC is off line or some other aspect of the system is down because I'm playing with it. The outdoor lights, some key triggers like the bedtime sequence, etc could be handled by this.