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Exactly... I see this as a potential major problem.. But maybe that's just a few of us

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

Very good points here! It does require its own set of mining power and is much more complicated than a copy-paste.