What a weird idea. If there is no catastrophic reason to do it (e.g. hash algorithm is flawed), then hardforking just to completely change the mining algorithm is a very bad idea. The original network for sure would keep running. Why wouldn’t it? Miners have invested in the hardware, everything is running fine, there is absolutely no reason for anyone to leave the network. You can hardfork the network, but I wouldn’t expect most of the community to follow. And even if they would do, the minority number of nodes can still run the original network with unchanged hashrate and dump the forked coin on the first occasion. So, you would just create a new coin with predetermined coin distribution…