Look at bitcoin cash, the bitcoin 1st fork, is people using it? Only a few.. there can be created as many forks as you want but are separate systems, separate software versions, that need separate mining power. It's not that simple as a copy paste. A currency have the power people give: if for new bitcoin version people will buy , it will take value and will work eventually... Otherwise it will just be a unused software that nobody cares about to use or mantain