When I’ve built my house, near 2010, I’ve fully equipped it with Velbus modules: around 5 fonctions (temp, blind, dim, relays, switchs) for each rooms. The big project still run and I’m writing some codes on Raspberry to control it better (giving some intelligence to control blinds in summer or closed them when night is coming.
You can have a look to my Velbus projects on my github account.