That would mean to stay decentralized everyone would need to be cross compatible with each other. Everyone would need to constantly be updating their nodes to be more  compatible. That is a lot of down time and a lot of centralization. Too many rules. There is also deflation to consider. Those that choose to spend #bitcoin will always be over paying in the long run. Technology will be so advanced in the next few decades the need to spend bitcoin collapses. People will be self sustaining with robotic farms, renewable energy, self driving taxis, drones, etc.