Yes, re-wiring is a good idea for safety and flexibility especially with period properties that haven’t been updated for a while. 


Modern electrical regulations are a lot safer than previous standards and it’s unlikely that a wiring job done, say thirty years ago, will have enough sockets to satisfy the amount of devices in use around the house today. Lighting has got more sophisticated too, with fewer people happy to rely on just a central light fitting in the ceiling in each room.