in fact, some projects that you think die are not entirely true, because many projects continue to run even more advanced but they do not care about the price of their coins in the market so that their coins are dead, but actually the project is still running
Yes, that's true. However, there is not a small number of investors who stick to them because their charisma is weak and/or their value weakens, and so their prices continue to decline up to the point they have no value at all and becomes dead.
It's like they keep holding on to this projects because they invested so much; they are too lazy to pick it up it and it is a pity to drop it. We need to get rid of dead projects.