Use my connected product

• If there is a power cut, will my MyHOME installation still work? Is there a memory function in all devices?
• If there is an Internet outage in my home, will my MyHOME installation continue to work?
• Can I modify a functionalities of a local command present in my home? For example invert a 2 pushbuttons on the same comand?
• Will all the features available on MyHOMEServer1 be available on Classe 300EOS with Netatmo?