That’s one of the best explanations I’ve seen of how language death happens (beyond the trivial “the last speaker died”), and it makes the inevitability (given the right circumstances) depressingly clear. I realize there are plenty of people who are indifferent to language death — or even welcome it as a step toward that glorious future when we will all speak one language, share the same sociopolitical system, and use the same detergents, and the lion will lie down with the lamb — but I am not one of them.