Are you asking a question, or stating a fact?
I think many people installed other 12v sockets since they needed more wattage than what the stock socket supplies. I've got the stock socket installed (by previous owner) and it works fine to charge my mobile phone. But if you want to plug in an air compressor or other appliance which requires more watts (I can't remember the nominal amount), you'd need a different socket.
"You live more in five minutes on a bike like this going flat out than some people live in a lifetime.", Burt Munro.