There are many reasons to replace receptacles. Some examples are updating 2 prong to 3 prong receptacles, updating to newer more safe receptacles that are tamper resistant or having USB/USB-C integrated into the receptacles. Receptacles might not be holding the plug in anymore or are damaged, this is also a safety hazard. Whatever your reason call Shrigergy Electric! We will send our licensed residential electrician to go over some options with you.