I am not sure how your link disputes the title. A hard fork to a new currency still means that the past currency is unusable forever, and in the world of crypto, that means lost forever.
People have developed this expectation for currency (a dollar being this thing that you can hold which always equals this amount printed on this price tag) without having any real understanding of what currency is really. This leads to odd assumptions.
When you invest in the stock market, and the market crashes, THAT money is lost forever. This is not that.
No, it isn't, because the price can go back up in the future. In this case, there is no hope of recovery unless you count the entire network pretending this never happened as recovery. Ironically, the real stock market is more immutable in practice than Eth.