I just installed new switches (and receptacles) throughout my house. It wasn't difficult. The system is pretty simple, and it's marvelously stable---my house was constructed in the '70s, yet all of the new components fit into the same boxes as the worn out ones they replace. This is great!

Not to mention that the whole project has cost just a few hundred dollars, and the results will last decades. Why would I ever want my house to jump on the high tech upgrade treadmill?*

*Call me back when you can sell me robotic chicken legs for my house. That would be awesome.