How resilient are smart systems to voltage surges? Do you risk blowing out all of your smart switches and outlets during surges? There is the possibility of installing whole-house surge protection, but that only protects against external surges, and their clamping voltages are probably too high (so that it lasts a long time, since the MOVs sacrifice themselves) to protect the smart circuits.
The smart switches and outlets have microcontrollers and other fragile logic and will convert AC to low-voltage DC. A normal light switch will tolerate quite a bit of a surge, but these switches will not be happy.
